Right to move right. Left to move left. Up to jump. Touch red to beat the stage. Collect the key on the last level. Note: If jumping forwards, jump then start moving. Level creation: Press and hold D to draw ground/lava/walls/eraser/level finish. Press G to select the ground tool. Press L to select the lava tool. Press W to select the wall tool. Press F to select the level finish tool. Press E to select the eraser.
The original project The Quest For the Mystic Potion: https://scratch.mit.edu/projects/160414249/. The same credits on the original project.