There are a ton of games like this where it's a ball rolling around solving puzzles with pressure plates and platforms, etc. So I love the fact that you put a fun twist on it by giving it this kind of story and incorporating stealth into it. It's such a fun idea, being a sphere in a cube's world.
There were a few hiccups with cubes falling where they shouldn't and getting stuck, which happens when you have to push things around on a stage, but overall, this was really well done so I added it to my list of bonus games. Keep up the good work!