Congrats on finishing a jam game, if you're new to development!
The game was interesting, although some parts the gameplay felt a bit clunky (for instance, you had a laser, but really didn't use it that often). It might have helped if there was a clear goal or some way to see progress other than finding more notes and more secrets.
Simple sound effects and music would be a good thing to add to future projects!
I did find one bug, which was falling off too far to the left in the first dimension, as mentioned by another commenter.
Great work for a month!