Love the story and setting of this one, it is very funny and novel.
I think I have found, if not a couple of bugs, then a couple of design issues. First of all, the blocks in the third level did not cause the donuts to bounce, meaning that though popping them was satisfying they didn't actually impact the gameplay. Secondly in the fourth level, you have to hit a button with a donut to open a door, and are given an extra donut to do so. However, this donut will continue to bounce afterwards and eventually reset your progress as the game assumes the donut has failed to reach it's target. I could be wrong, there might just be an internal timer for how long you have in each level but if it is tied to the donuts bounces then I think this is a potential problem. I would maybe like to have had a button like 'R' to manually refresh the level instead.
Hope this helps, will happily play more but this is what I found to start with.