9 for paint, 0 for erase. < for rotating clockwise, and > for counterclockwise. ^ to switch blocks. Space key to place/break the block. V to view the stage w/o the brush. E to edit with the brush. WASD to move the block. F to fix the block, if it's misaligned.
Forkphorous/Sulfurous/Phosphorous breaks it :/
