It's a pretty cool concept, but the art could be a bit better.
You've got some pixel art, some really HD art, and then what seems to be just shapes. All of them look cool on their own but when you put them together it doesn't really fit as well as it could (also it looks like you've left anti-aliasing on for the pixel art which makes it look rather blurry)
The concept is really unique though, and you pulled it off pretty nicely! For a first game jam, this is a pretty good start!