Use arrow keys or wasd to move around (left, right, jump, crouch). You do not have to get every green apple to complete a level. There are also mega apples which are gold. There are nine levels, each with a new challenge added. Comment below if you beat the game from levels 1 to 9 with out level editor. Hit q and r at the same time to restart the level and p to pause. Not mobile friendly (sorry).
Griffpatch made the original code, so thanks to him. Make sure you have fun.