Use up, down, right, left, or W, A, S and D to move around. Press 0 to go into the editor mode. While you are on 0 you can press 1-4 to place different blocks. L to change level (only 1-6 have been made). Press R to reset the level. However, I don't recommend pressing R.
Thank you to @Griffpatch for the tutorial videos on how to make a tile-based scrolling platformer
