Very good take on the topic, however it gets a bit repetitive quickly - always the "2 coins" - but, that's understandable for the jam. Really cool music though. I just wish the controls when moving were a bit more delicate as it's sometimes almost impossible to align properly when you have the upgrade to pass things - if it wasn't for that annoyance the game would feel much better!
I love abusing jumping to the left wall and hugging the ceiling though in many levels, feels satisfying :D