I don't know if I understand the point of Dozer if Rosetta can also destroy blocks. It makes sense for getting a better score, but I was having a harder time completing these stages than anything. The time limit just seems too harsh. Maybe there could be a way for Dozer to add more time. Right now they feel more like a time-out. That said, it's great that you've got ten unique levels here. It's a lot of completed content for 48 hours.