Thank you very much! I'm glad you enjoyed it! The game itself was modeled after the original Super Mario Brothers a bit. I've never played Super Mario Odyssey so it's super cool that there's a connection there.
The confusion over interactable objects is the most common feedback I've gotten. My play-tester told me about it too, but I didn't have time to fix it before he jam. I have plans to fix it after the jam.
This was my first platformer, and I spent a while researching jump mechanics. I actually have different gravity modifiers for the jump and fall parts of the jump. Someone early on in the comments linked me a great video that I learned some more from. When I first balanced the jumping, it was on level 2:1, the graveyard, and I had no plans for those super huge jumps. The problem I was having increasing the fall gravity, is that then you got very little horizontal movement. But I agree with you, playing it now it feels a bit too floaty. Although without the floaty feel I imagine the 1st-person level (1:5) would feel insanely hard. I will play with it though and maybe give a horizontal boost in the air.