Just a couple bugs I saw 1. I believe (this means I'm wrong) dying, and reloading a game causes problems with memory, especially if you consistently do it (forcing good krongs, etc). The game gets up to 1.2million kb of memory and starts to stutter/crash. Memory leak I suppose? 2. When in Bat form and flying over liquid tiles, when you hit save and continue you lose your bat buff and drown. Since the game is saved, you are permanently stuck in a drowning zone. You will probably lose your bat buff if you hit save and quit as well. 3. Playing as a female and drowning shows the male sprites as you drown. Also, if you drown in anything other than the blue water areas, the splash sprites shown on the body will always be blue. Drown in lava or green liquid, it will show a blue splash as you drown.
There is definitely a memory leak for me with humble bundle 1.09 version on windows 7 64bit. I watched the game while running Process Explorer. Going up a flight of stairs (or down) adds 10MB of ram usage to the game every time you go up and down. Every time you LOAD a game you add another 50MB to it's usage. When you "quit" there is a few megs of ram freed up, but if you load again without closing the program, it increases to 50 or more megabytes of ram than before you quit. This happens every time you load or go up stairs.