This was an incredible game! I can't believe how much you were able to accomplish in 10 days. This is definitely something to be proud of. It is one of my favorites of the jam so far. The music was great and not too repetitive, the sound effects were fun, and visuals were consistent. I think maybe a slight screenshake would have given the game a bit more feel when hitting/killing enemies or being hit.
A little more in-game instruction would be helpful as well as more info as to what the items do when you pick them up. But I did see that information was available in the pause menu. I did not come across any strange bugs, but the spike hit boxes seemed a little big on the sides.
Like I said, amazing game. Very well done!