I really enjoyed the game. I love games with these kind of upgrade paths! Really cool that you did all the assets yourself!
Some feedback for improvement:
- The aim was always a bit off. Not sure if that is intended to make it harder, but it was a bit frustrating for me at times when things just didn't hit
- I had two rooms back to back which gave me the exact same riddle. Maybe that can be improved as well
Really great work, especially considering you did everything yourself and solo! :)