Upit | Learn about creating the game Tower Defense: Goblin Invasion with gen AI
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Goblins have launched a full-scale invasion—and only your towers stand in their way. Build, upgrade, and defend your castle against 100 relentless waves. Choose your strategy, unlock powerful defenses, and survive the chaos. This is the tower defense game you’ve been waiting for.
#TowerDefense
#StrategyGame
#CastleDefense
#MobileStrategy
#DefenseGame
##towerDefence
#strateji
#strategy
#RealTowerDefence
#game

Creation History

User prompt

Change the location of rocks and make the tower building point 200 pixels away from any object, text or road

User prompt

Change the location of rocks and make the tower building point 200 pixels away from any object, text or road

User prompt

Place rocks in 10 empty spaces on the map, at least 100 pixels away from any object.

User prompt

Move the settings button in the top left 80 pixels down

User prompt

Move the settings button in the top left 80 pixels down

User prompt

Move the settings button in the top left 50 pixels down

User prompt

Move the settings button in the top left 30 pixels down

User prompt

Move the settings button in the top left 20 pixels down

User prompt

Move the settings button in the top left 20 pixels down

User prompt

Move the settings button in the upper left a little down

User prompt

Move all trees. Trees should never be even close to roads or tower installation points.

User prompt

There is a tree near the gold text, move that tree to a distant and empty location

User prompt

move all the trees, Trees should never be even close to the road or tower installation points.

User prompt

move all the trees

User prompt

Trees appear in different locations in each new game. Let's fix this and have them appear in fixed locations and not change every game

User prompt

remove village house roof object

User prompt

The mute button is visible, but currently does nothing when clicked. Please implement the following: 1. **Mute Toggle Functionality:** - When the mute button is clicked: • Mute or unmute all game audio (sound effects and music). • Toggle a global audio flag or use the engine’s built-in mute function. 2. **Visual Feedback (Mute Indicator):** - When the sound is muted: • Show a small "X" or slash symbol over the speaker icon for 1–2 seconds. • This can be a temporary overlay or animation to indicate audio is off. • After a few seconds, the "X" disappears, but the mute state remains active. 3. **Optional:** - You may also use a slightly dimmed or grayscale version of the speaker icon when muted. This will clearly communicate to the player that audio is off and ensure the mute button is fully functional. ↪💡 Consider importing and using the following plugins: @upit/tween.v1

User prompt

The main menu was added correctly, but there is an issue when clicking the “Start Game” button: - After clicking “Start Game,” the screen turns green or blank, and the actual game does not begin. - It seems the button is not properly linked to the function or scene that initializes the game. - Please fix the following: 1. Ensure the “Start Game” button correctly loads or switches to the main gameplay scene. 2. The game initialization logic (map setup, tower panel, enemy spawner, etc.) should fully trigger after clicking the button. 3. If the game runs in a separate scene or container, make sure it is created and shown when the button is clicked. This issue prevents the game from starting and needs to be resolved so the player can enter the gameplay after the menu.

User prompt

Please add a simple main menu screen before the game starts, with the following buttons: 1. New Game – Starts the tower defense game. 2. How to Play – Opens a short instruction screen. 3. Credits – Opens a screen that displays: - Game Design: ilker.mez - AI Assistant: Grok + GPT - Platform: Built using upit.com Make sure the menu has a simple background and buttons are centered. Also, during gameplay, add a small settings icon in the top-right corner that opens a pause menu with: - Return to Main Menu - Mute/Unmute Audio

User prompt

Please implement the following visual and feedback improvements: --- 1. **Death Effect for Enemies:** - When any enemy dies, trigger a **small explosion or burst effect** at their position. - The effect should: • Be quick and visually satisfying (e.g., a puff, spark, or mini shockwave). • Last about 0.3–0.5 seconds. • Use a sound effect if possible (optional). - Ensure that this effect does not interfere with performance or gameplay mechanics. --- 2. **Round Start Announcement:** - At the beginning of each wave/round, display a **centered round counter message** on the screen for 2 seconds. • Example text: “Wave 2 / 100 Starting...” • The text should: - Be centered on the screen (over gameplay). - Use large, clear font with a slight animation (fade in/out or scale pop). - Automatically disappear after 2 seconds. - Ensure that this does not pause the game, only acts as an overlay notification. --- These effects will provide stronger feedback for enemy defeats and round progression, making the game feel more dynamic and polished. ↪💡 Consider importing and using the following plugins: @upit/tween.v1

User prompt

Please expand and rebalance the game's enemy and wave system with the following structure: --- 1. Total Waves: - Extend the game to have **100 total waves**. --- 2. Enemy Variety: - Add **20 new enemy types**, each one stronger than the previous. - These new enemies should have progressively increasing: • Health • Speed • Special abilities (optional: e.g., shield, poison resistance, faster movement) - Combine them with the 10 existing enemies to make a total of **30 unique enemy types**. - Introduce a **new enemy type every 3 rounds**: • Wave 1: 1st enemy type • Wave 4: 2nd enemy type • Wave 7: 3rd enemy type • ... • Wave 88: 30th enemy type - Enemies should appear **in mixed groups**, so older/weaker types still show up along with newer ones. --- 3. Wave Size Progression: Update the number of enemies per wave as follows: - **Waves 1–5:** 15 to 20 enemies - **Waves 6–15:** 20 to 25 enemies - **Waves 16–30:** 25 to 35 enemies - **Waves 31–60:** 35 to 45 enemies - **Waves 61–97:** 45 to 55 enemies - **Waves 98–100:** 60 to 75 enemies Use randomized amounts within the given ranges to keep each wave unpredictable. --- 4. New Enemy Names (20 Types): Please use the following names for the 20 new enemy types, ordered weakest to strongest: 1. **Mire Crawler** 2. **Fang Imp** 3. **Crimson Leaper** 4. **Rustback Beetle** 5. **Gravel Hound** 6. **Vine Stalker** 7. **Ashborne Wraith** 8. **Stonehide Orc** 9. **Toxic Maw** 10. **Frostback Boar** 11. **Ironmaw Troll** 12. **Volcanic Strider** 13. **Stormblade Knight** 14. **Twilight Serpent** 15. **Obsidian Colossus** 16. **Spectral Ravager** 17. **Boneclad Warbeast** 18. **Plague Titan** 19. **Abyss Reaper** 20. **Void Devourer** Ensure these enemies appear in increasing difficulty and stats as the game progresses. --- This full system will greatly enhance replayability, pacing, and strategic challenge.

User prompt

Lütfen aşağıdaki iyileştirmeleri düşman birimlerine uygulayın: --- 1. Ek Sağlık Güçlendirmesi: - Tüm düşmanların sağlığını (HP) mevcut tüm sağlık değiştiricilerine ek olarak ek **%10** artırın. - Bu, önceki artışlarla birleşmeli ve küresel olarak tüm düşman tiplerine ve dalgalarına uygulanmalıdır. --- 2. Bireysel Düşman Sağlık Çubukları: - **Her düşman biriminin üzerine küçük, bireysel bir sağlık çubuğu** ekleyin. - Sağlık çubuğu: • Düşman sprite'ının üstünde veya yakınında görünmelidir. • Düşman hasar aldıkça gerçek zamanlı olarak görsel olarak azalmalıdır. • Kalan sağlığı net bir şekilde göstermek için renkli bir dolgu (örneğin, yeşilden kırmızıya degrade veya sadece kırmızı) kullanın. • Mevcut HP'ye karşı maksimum HP'ye göre ölçeklenmelidir. - Düşman öldüğünde çubuk kaybolmalıdır. Bu değişiklikler, oyuncuyu bunaltmadan stratejik geri bildirimi ve zorluğu iyileştirir.

User prompt

Please implement a scalable cost system for tower upgrades based on each tower's base price: 1. First Upgrade Cost: - The cost of the first upgrade should be equal to the tower's **original purchase price**. • Example: If a Soldier Tower costs 80 gold, its first upgrade also costs 80 gold. 2. Subsequent Upgrades: - Each additional upgrade should cost **80% of the base price more** than the previous upgrade. • Example (base price = 80 gold): - Upgrade 1: 80 gold - Upgrade 2: 80 + (80 × 0.8) = 144 gold - Upgrade 3: 144 + (80 × 0.8) = 208 gold - and so on... 3. Scaling Logic: - Apply this formula consistently across all tower types. - Base the increase on the **original tower cost**, not the previous upgrade cost percentage-wise. This system ensures balanced scaling that rewards early investments but becomes more challenging over time.

User prompt

Please further increase the durability of all enemies: - Increase the health (HP) of all enemy units by an additional **10%** on top of any existing health values or buffs. - This should apply to all enemy types across all waves. - The goal is to make enemies more resilient and require stronger or upgraded towers to defeat them efficiently. Make sure this adjustment stacks properly with previous health increases (e.g., if already increased by 20%, the total increase becomes approximately 32%, not 3

User prompt

Please adjust the enemy reward and durability stats to improve overall game balance: 1. **Gold Reward Increase:** - Increase the amount of gold earned from each enemy by **10%**. - This helps players afford upgrades and new towers more consistently as the difficulty increases. 2. **Enemy Durability Increase:** - Increase the health (HP) or overall toughness of all enemies by **20%**. - This ensures that despite the increased gold gain, enemies remain a consistent threat and cannot be defeated too easily. Both changes should be applied globally across all enemy types and waves. This creates a balanced challenge while rewarding effective defense strategies.

===================================================================
--- original.js
+++ change.js
@@ -1658,15 +1658,15 @@
 		buffer = buffer || 200;
 		// Check boundaries
 		if (x < 50 || x > 1998 || y < 50 || y > 2682) return false;
 		// Check castle area
-		if (Math.sqrt((x - 1024) * (x - 1024) + (y - 2200) * (y - 2200)) < 300) return false;
+		if (Math.sqrt((x - 1024) * (x - 1024) + (y - 2200) * (y - 2200)) < 300 + buffer) return false;
 		// Check waterfall area
-		if (x >= 1500 && x <= 1600) return false;
+		if (x >= 1500 - buffer && x <= 1600 + buffer) return false;
 		// Check central lake area
-		if (Math.sqrt((x - 1024) * (x - 1024) + (y - 1366) * (y - 1366)) < 200) return false;
+		if (Math.sqrt((x - 1024) * (x - 1024) + (y - 1366) * (y - 1366)) < 200 + buffer) return false;
 		// Check original lake area
-		if (Math.sqrt((x - 400) * (x - 400) + (y - 500) * (y - 500)) < 150) return false;
+		if (Math.sqrt((x - 400) * (x - 400) + (y - 500) * (y - 500)) < 150 + buffer) return false;
 		// Check all enemy paths with buffer
 		var allPaths = [enemyPath1, enemyPath2, enemyPath3];
 		for (var p = 0; p < allPaths.length; p++) {
 			var path = allPaths[p];
@@ -1675,11 +1675,11 @@
 					return false;
 				}
 			}
 		}
-		// Check build zones
+		// Check build zones - now requiring 200 pixels distance
 		for (var i = 0; i < buildZones.length; i++) {
-			if (Math.sqrt((x - buildZones[i].x) * (x - buildZones[i].x) + (y - buildZones[i].y) * (y - buildZones[i].y)) < buffer) {
+			if (Math.sqrt((x - buildZones[i].x) * (x - buildZones[i].x) + (y - buildZones[i].y) * (y - buildZones[i].y)) < 200) {
 				return false;
 			}
 		}
 		// Check village house areas
@@ -1859,37 +1859,37 @@
 		y: 2000
 	}];
 	// Define rock positions in empty spaces at least 200 pixels away from any object
 	var rockPositions = [{
-		x: 500,
-		y: 1100
+		x: 200,
+		y: 800
 	}, {
-		x: 1500,
-		y: 500
+		x: 1700,
+		y: 350
 	}, {
-		x: 300,
-		y: 1600
+		x: 250,
+		y: 1700
 	}, {
-		x: 1700,
-		y: 1600
+		x: 1800,
+		y: 1500
 	}, {
-		x: 600,
-		y: 400
+		x: 700,
+		y: 350
 	}, {
-		x: 1400,
-		y: 200
+		x: 1600,
+		y: 100
 	}, {
-		x: 1800,
-		y: 1100
+		x: 1900,
+		y: 950
 	}, {
-		x: 350,
-		y: 900
+		x: 150,
+		y: 1200
 	}, {
-		x: 1550,
-		y: 1400
+		x: 1700,
+		y: 1200
 	}, {
-		x: 750,
-		y: 1600
+		x: 650,
+		y: 1750
 	}];
 	// Use the first 50 fixed positions (or however many we have)
 	for (var i = 0; i < Math.min(50, fixedTreePositions.length); i++) {
 		treePositions.push(fixedTreePositions[i]);
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Images

A lake with a 3d view. In-Game asset. 2d. High contrast. No shadows tree. In-Game asset. 2d. High contrast. No shadows house. In-Game asset. 2d. High contrast. No shadows magic ball. In-Game asset. 2d. High contrast. No shadows arrow bullet. In-Game asset. 2d. High contrast. No shadows realistic majestic castle. In-Game asset. 2d. High contrast. No shadows dirt road. No background. Transparent background. Blank background. No shadows. 2d. In-Game asset. flat This is a button, the outer part is red, the middle circle is red, the 2nd circle is dark gray. No background. Transparent background. Blank background. No shadows. 2d. In-Game asset. flat village house. In-Game asset. 2d. High contrast. No shadows poisonous tower realistic. In-Game asset. 2d. High contrast. No shadows freezing tower realistic. In-Game asset. 2d. High contrast. No shadows goblin. In-Game asset. 2d. High contrast. No shadows goblin emperor. In-Game asset. 2d. High contrast. No shadows haydut goblin. In-Game asset. 2d. High contrast. No shadows titan goblin. In-Game asset. 2d. High contrast. No shadows goblin tazısı. In-Game asset. 2d. High contrast. No shadows gezgin goblin. In-Game asset. 2d. High contrast. No shadows kıyamet canavarı goblin. In-Game asset. 2d. High contrast. No shadows kemikli iskelet goblin. In-Game asset. 2d. High contrast. No shadows buzul goblin. In-Game asset. 2d. High contrast. No shadows golem goblin. In-Game asset. 2d. High contrast. No shadows kadın goblin imparatoru. In-Game asset. 2d. High contrast. No shadows demir goblin. In-Game asset. 2d. High contrast. No shadows şövalye goblin. In-Game asset. 2d. High contrast. No shadows obsidyen dev goblin. In-Game asset. 2d. High contrast. No shadows üzerinde okçu olan, ahşap, okçu kulesi. In-Game asset. 2d. High contrast. No shadows ahşap hava savunma kulesi, üstünde arbalet olsun. In-Game asset. 2d. High contrast. No shadows antik elektrik atıcı kule. In-Game asset. 2d. High contrast. No shadows goblin canavar. In-Game asset. 2d. High contrast. No shadows volkanik gezgini goblin. In-Game asset. 2d. High contrast. No shadows kahverengi gezgin eli bıçaklı goblin. In-Game asset. 2d. High contrast. No shadows büyücü goblin. In-Game asset. 2d. High contrast. No shadows paslı böcek goblin. In-Game asset. 2d. High contrast. No shadows spektral yıkıcı goblin. In-Game asset. 2d. High contrast. No shadows taş goblin. In-Game asset. 2d. High contrast. No shadows kimyasalcı goblin, boydan. In-Game asset. 2d. High contrast. No shadows yuvarlak havan topu mermisi. In-Game asset. 2d. High contrast. No shadows karanlık büyücü goblin. In-Game asset. 2d. High contrast. No shadows yeşil yapraklı dövüşçü goblin. In-Game asset. 2d. High contrast. No shadows kayalık. In-Game asset. 2d. High contrast. No shadows uçan küllü goblin. In-Game asset. 2d. High contrast. No shadows uçan goblin yılan. In-Game asset. 2d. High contrast. No shadows kırmızı kaslı uçan goblin. In-Game asset. 2d. High contrast. No shadows uçan karanlık goblin. In-Game asset. 2d. High contrast. No shadows uçan goblin yağmacı. In-Game asset. 2d. High contrast. No shadows uçan fırtına golem. In-Game asset. 2d. High contrast. No shadows

Sounds & Music

🎵

enemy_hit

Sound effect

🎵

coin_gain

Sound effect

🎵

shoot_arrow

Sound effect

🎵

upgrade

Sound effect

🎵

wave_start

Sound effect

🎵

tesla_knock

Sound effect

🎵

placement

Sound effect

🎶

main

Music

Used plugins

@upit/tween
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