This is pretty cool game! I love the idea, and the cute pixel art works well. The music and SFX are good too.
I did have trouble judging exactly where the character was in isometric space, and this problem multiplied once floating items were introduced... I found it extremely difficult to collect those.
Each level is cool looking, but the challenge gets a little over the top. Level 4 in particular feels like there's no way to navigate the chaos, with too many enemies and items coming from all directions.
I encountered a strange bug too. I played straight through, and on level 3 my character was gone, though their shadow was on the ground. I couldn't collect items, but also didn't get hit by enemies.
I think with a little refinement to the level design, this would be a really fun game! Even as is stands currently, it's a solid jam entry that clearly had plenty of love and time put into it! Nice work!