Finished all the levels yesterday; now I’m trying to get the full three stars on all of them. It’s slow going, with some levels (2-7, I’m looking at you) taking dozens of goes to complete properly.

But, really, this is an excellent game. It loads quickly, you can retry instantly, there aren’t any control issues, it looks great – it’s a hugely polished, brilliant implementation of (someone else’s) great idea.