===================================================================
--- original.js
+++ change.js
@@ -145,9 +145,9 @@
 	self.render = function () {
 		// Move tiles instead of the view
 		for (var x = self.currentViewCenter.x - viewSize - 1; x <= self.currentViewCenter.x + viewSize; x++) {
 			for (var y = self.currentViewCenter.y - viewSize - 1; y <= self.currentViewCenter.y + viewSize; y++) {
-				if (x >= 0 && x < self.cells.length && y >= 0 && self.cells[x] && y < self.cells[x].length) {
+				if (x >= 0 && x < self.cells.length && y >= 0 && y < self.cells[x].length) {
 					var cell = self.cells[x][y];
 					var asset = cell.asset;
 					var screenX = (x - self.currentViewCenter.x + viewSize) * asset.width;
 					var screenY = (y - self.currentViewCenter.y + viewSize) * asset.height;
@@ -223,9 +223,9 @@
 		self.currentViewCenter.x += (targetViewCenterX - self.currentViewCenter.x) * 0.1;
 		self.currentViewCenter.y += (targetViewCenterY - self.currentViewCenter.y) * 0.1;
 		console.log("handling drag...", input, self.currentViewCenter.x, self.currentViewCenter.y);
 		// Update the Text2 object with the new coordinates
-		self.viewCenterText.setText(Math.round(self.currentViewCenter.x) + ', ' + Math.round(self.currentViewCenter.y));
+		self.viewCenterText.setText(self.currentViewCenter.x + ', ' + self.currentViewCenter.y);
 		//selectionMarker.setOnElement(currentSelection);
 	};
 	self.checkCollisions = function () {
 		// Handle collisions between units and obstacles
@@ -978,21 +978,21 @@
 			var selCell = getCellForUnit(currentSelection);
 			console.log("currentSelection = " + currentSelection.name + "  at " + selCell.cellX + ',' + selCell.cellY);
 			deltaToSelection = Math.sqrt(Math.pow(Math.abs(selCell.cellX - cellX), 2) + Math.pow(Math.abs(selCell.cellY - cellY), 2));
 		}
-		if (cellX >= 0 && cellX < mapXSize && cellY >= 0 && cellY < mapYSize) {
-			var cell = gameMap.cells[cellX] ? gameMap.cells[cellX][cellY] : undefined;
-			if (cell && !cell.building && !cell.unit && deltaToSelection > 1) {
+		if (cellX >= 0 && cellX < gameMap.cells.length && cellY >= 0 && cellY < gameMap.cells[cellX].length) {
+			var cell = gameMap.cells[cellX][cellY];
+			if (!cell.building && !cell.unit && deltaToSelection > 1) {
 				currentSelection = null;
 				selectionMarker.hide();
 				console.log("Nothing selected at " + cellX + ',' + cellY, " deltaToSelection=" + deltaToSelection);
 				updateActionBoard();
-			} else if (cell && cell.building) {
+			} else if (cell.building) {
 				console.log("Selected building at " + cellX + ',' + cellY);
 				currentSelection = cell.building;
 				selectionMarker.setOnElement(currentSelection);
 				updateActionBoard();
-			} else if (cell && cell.unit) {
+			} else if (cell.unit) {
 				console.log("Selected cell with unit at " + cellX + ',' + cellY);
 				console.log("unit at  " + cell.unit.x + ',' + cell.unit.y);
 			}
 		}
@@ -1009,12 +1009,8 @@
 	if (!gameMap.cells[cellX] || !gameMap.cells[cellX][cellY]) {
 		console.log('Invalid cell for building placement.');
 		return;
 	}
-	if (!gameMap.cells[cellX] || !gameMap.cells[cellX][cellY]) {
-		console.log('Invalid cell for building placement.');
-		return;
-	}
 	var cell = gameMap.cells[cellX][cellY];
 	if (cell.building) {
 		console.log('Cell is already occupied.');
 		return;