Thanks for playing our game Matt! That was most likely a bug, though we did have an iteration where stomping was part of the game we ended up with a LOT of bugs like the one you experienced. As novice game developers, we couldn't quite figure out why the physics bodies would magic themselves through collision layers, shapes, etc. It sounds like this is a common problem and somewhat fixed by the physics process speed. We've definitely learned a lot from that experience.
Thank you for all the feedback about each aspect of the game! I'm very glad you enjoyed our game. We look forward to participating in the future!