CONTROLS
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(Player)
Move with arrow keys
X - Jump
Z - Run

(Maker)
Move with arrow keys
X - Delete block
Z - Place block
A/S - Select the block you want to place
-/+ - Cycle through the hotbars

Make your levels, then have someone else play them or play them yourself. Save your levels with a very long text, then copy the text to the clipboard and paste to the note application. Then, enter the text to the game load the levels you created.