Huh! I think I know why that type of bug occurs, but I thought I had successfully squashed it. What happens is that the frog’s texture gets messed up and assigned to the wrong set of images, but the animation data is preserved, so it looks very funny. I’ll take a look, thanks!
edit: I fixed this bug! Thanks for reporting it! It had to do with how the level resets to the last checkpoint after you die. The trigger for the bug was that you had to die a lot of times in a map that contains bows and arrows.