Hover over the options bar and hover over the cursor mode that you want to be on (don't click just hover). Mouse mode moves the player and block mode places blocks. Hit the space bar to start the level. Use arrow keys to move.
100% by me, @laserman983. Hopefully soon: -spikes -enemies -water -save codes -erase mode -level can be beat Try spawning the blue guy into the red blocks. ;)
