Press space to select a level size (1 is small, 3 is big) Use the arrow keys/ space bar to select a block Click to place a block, hold and drag to place a bunch of blocks Push s to start and e to edit (don't push s or e when on level size select) Push x to show/ hide x and y coordinates Push a to delete all blocks Press c to change Blocky's color ( ͡° ͜ʖ ͡°) I had to change the color of the ladders in order to get them to work, but hey, they look cooler now :P
I saw griffpatch's grid tiles tutorial and thought it would be cool to make a level editor out of it. I also improved it by adding a delete tile and making the code better.