The invasion is coming. Click to use your laser. Place barriers to block invaders. Don't let the invaders break your blocks! Hit the top of the screen with your mouse to open the shop, and pause the game. Hit the top of the screen again to close it. Once too many clones get on the screen the score display glitches, just hover over it to see the score via scratch's built in viewer.
Are you pro enough to get 100+ points?