Create your very own game (Or level) by using tools on the left. You can even decide how high your character goes when it jumps, how much lives it has, and much more! You can even make it not be able to jump at all if you set the jump power to 0! Move your character by using the arrow keys. Use the up arrow key to jump, use the left arrow to go left and use the right arrow to go right. Enjoy!
If you have any suggestions, please tell me in the comments section!