You are walking over colored blocks, make sure you don't fall, because at the base are sharp knives that will kill you. The colored blocks keep falling and you are getting closer and closer to the ceiling. When you press the space bar you shoot, all connected blocks of that colour will be destroyed. It buys you time, but pay attention, they keep falling. And now there are blocks falling with knives on them. You can jump them, and if you destroy the blocks underneath, the blocks with knives will disappear. Try to stay alive and destroy as many blocks as you can. Show us how high your high score can be.
Use the arrow keys to move and the space bar to shoot.