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Please fix the bug: 'Uncaught TypeError: Cannot set properties of null (setting 'x')' in or related to this line: 'player.x = px;' Line Number: 348

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Add a starting screen ( with the title and a play button )

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Make the boss to take 6 hits to defeat it

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Make the boss to shoot the rockets less frequently, and less spread themed rather faster bullets in single direction and ricochet.

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Make the enemy ships to stay in one place too ( randomly ) also decrease the frequency of the rockets from enemies to spawn

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make the enemy space ship to take 3 hits to defeat it ( instead of 1 ), also at 0 point spawn in 2 enemies, 1 point add an enemy ship with the previous ones, continue the same until point 6, cap the number of ships to be 6

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For each point gained upto 5, add one more enemy ship in the screen

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Revert the logic, make random ships to spawn

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Fix after defeating the first 2 enemy ships, no ship is spawning in

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If there is no enemy ship spawn in +1 ship

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Start by spawning in 2 enemy ship and for each rocket defeated spawn in +1 enemy ship

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Get the hearts little bit to the left

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Slow down the enemy speed and bullet speed. And the bullet should only go vertically down ( don't target the player )

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Hi Ava, Now I want to create a game based on space shooter. Game Mechanic: -> We control a space ship beginning from the bottom of the screen, which shoots out rockets. -> Enemies are alien space ship that follows from above the screen. -> Enemies shoot rockets at us too, and we have to dodge it. -> Certain enemies are different ( very rare to spawn ) which can give power ups. Gameplay: -> Make the ship to follow the clicked mouse, ( the ship should be constantly shooting the rockets ) -> The ship has 3 lives, when hit by enemy rockets, we loose health -> power ups from aliens: Fast shooting guns, extra life ( grants extra life ), destroy all ball ( grab to destroy everything ), shield ( to protect from enemy attacks for a brief time ) Gameplay mech: -> Clearing enemies grants points, enemies should go to random locations on top, should not come down, they shoot randomly. each alien ship defeated grants 1 point, when reaching 20 points, a single boss spaceship appears, when defeated we win ( the boss shoot rockets frequently, and in different directions that richochet the screens )