I loved the sound effects for the pickups and the sound effects for the enemies were very fitting. I like the interesting game mechanic of running around in the circle to recharge the energy for shooting. The art style is minimalistic and very clean.
While playing my main strategy was to run away from the scary hissing enemy then constantly moving while trying to shoot. I forgot I could go back for upgrades until I could already buy the max upgrade lol. The camera looking ahead of the shot is a very nice touch.
One thing I would have liked is to be able to hold down the LMB to fire rather than spam clicking, which is less painful on the wrist lol.
Overall a lovely and fun to play game! Great work!