This is a spectacular game and super well made for a jam, from sound to art to design! It's very fun once you get the hang of it. My favorite aspect is that the entire game is played with just two actions, but with those two actions can do different things like explore mini corridors, collect coins on top AND bottom, etc.
The literal only thing I think could have been tweaked is the hitboxes to be ever so slightly more generous. Like, just a pixel or even subpixel might make a sizeable difference.