Use the left and right arrows to move the horse horizontally. Press the up arrow to jump. The longer you hold the up arrow, the longer the jump. Make sure you don't hit any part of the rock. Now go and get that doughnut!!
Made this game with my 6-year old daughter in about 1 hour. She did about 60% of the coding (with a lot of my help), but she quickly knew what to do when I asked her questions. Super fun!!