Thank you so much for the thoughtful comment and feedback!!
Haha, yeah, we had a massive wishlist of things we wanted to implement, including more detailed backgrounds and parallax, but the whole project was a little rushed, to say the least! I think some of the Garfields going behind pillars was an issue with the sorting layers.
Hilariously, Jeff's infinite penguin slide started as a bug we decided to leave in (originally, you sort of parked in a spot when ducking, closer to Contra), but I'm glad that worked out!