NEW VERSION OUT: https://scratch.mit.edu/projects/936940825 Hover you mouse pointer over the thing you want to hit and click on it. (You could use an auto-clicker but I haven't tested that) Clicking to fast the game lags and then makes the red cubes stop spawning. Also press space to switch the backdrop. There are 2 backdrops. There may be some bugs. Feel free to comment.
Credit to kaboomcamera for some of the shop.