I played on this game for AGES!!! Initially I just draw in a ceiling and tried to make everything bounce the fastest and got up to 140 p/s, but then I restarted and just had fun casually drawing and experimenting and seeing how to create little traps for the balls and I didn't make a great piece of art but I was enjoying the process and experimentation - ended up getting 500+ p/s which felt rewarding !
I would totally pick this up for some down time and just to mess around with now and again as I'm sure I didn't cotton on to all the secrets of the balls :p
The implementation was good! The balls and physics and motion blur, solid! The drawing tools made you move slowly and that was a bonus I think, but I didn't try drawing anything specifically. I loved that it started out without any tools and then added those in afterwards, a nice way to introduce the player to the mechanics.
Like I said I got sucked in and really had a blast playing with this, a fantastic entry!