A lot of fun, and clearly a lot of effort was put in to polishing this. It's also quite rich in possibilities for mastery, which is cool, and it does require you to be at a certain level to unlock all the levels, but it's never that difficult. I think some tutorial elements are poorly delivered, and there are some levels that are a bit of a slog, and right at the end, a mechanic is introduced that I'm not a huge fan of, turning it into a bit of a very underwhelming finale. All in all though, it's a good bit of fun.