The ball's physics are extremely bouncy and yet that still doesn't make it any harder, since you can draw lines anywhere. Severely needs a challenge other than just pixel-perfect levels. It's fun to see people's creations and the graphics on the lines are flawless. As in, when you draw a ball it doesn't clutter the area with a bunch of different shadow lines but instead puts the shadow in the right spot. You wouldn't believe how hard that is to make for some people. I also don't like that there's no undo button, instead you have to clear everything you've made and start over. That isn't that big of an issue though since the levels are already piss easy.
In my opinion, this is a fun little game to play. However it gets repetitive and boring from the lack of any real challenge.
Also penis.