I tried the game and I can't seem to get past the second wave. With starting resources you can only build one tower and it's not enough to kill the two enemies. Am I missing something? It would also be nice to have some feedback of when the tower is firing (at least an audio effect, if not visual). I do like the look of the game.
@ioan-pop There are instructions in the main menu. When the square at the bottom of the screen is green you can click on a tile and press space to build a tower. Insutrctions say you can build on the left side of the screen, but it seems you can only build on the right.