Press up to jump Don't forget to love+fav if it helped! That'll also tell me that I should keep making these helpful projects :D As pointed out by @1150d, sometimes your sprite flies to the bottom of the screen and gets stuck there. To fix this, simply drag the sprite INTO the ground and you should be good to go!
Of course, you can always change the numbers to change how high the sprite jumps or how fast it falls! :)