+ Nice physics
+ Some clever designs
- Feels kind of generic, "déjà-vu" (even much so with the "three stars in every level" system)
- Some levels feel like you just have to try stuff, maybe matching colors between buttons/levers and the objects they activate could have solved this issue?
- No music on my system (latest Google Chrome version on an Ubuntu 12.04, no problem with other games whatsoever)
- No proper ending
- No Newgrounds achievements
Overall, a nice little game, with maybe too many levels? To me, it felt kind of easy and repetitive before level 15 or 20.