Okay, so I absolutely love this game. I've been playing almost nonstop for the past week. But there is a minor issue. If I go back and replay a level I've beaten already, like doing Plague over and over to try and get an achievement for killing so many enemies, I continue to get skill points from each win. And then I end up maxing out my stats while there are still levels that I haven't completed. But it won't let me apply my stats and move to the next level if I have unspent skill points.
So, like, after I noticed that I could replay levels and get more skill points, I started a second file and just replayed level 1 a bunch until I had, like, 30 skill points. And then I just played through the game like normal from then out and, if I got more skill points after I had maxed everything out, it just wouldn't let me leave the attribute screen.