Audio gets the easiest 5/5 I've given so far haha, beautiful soundtrack and effects. I ALMOST quit the game at the first level because I just thought it kept going forever, but luckily I read the itch page and saw E was to enter the orange cube, and then I made it and beat the final boss. Is there any reason why I shouldn't pick the health option everytime instead of an enemy? Maybe that option could be made a little more interesting somehow? It would also be nice with some way of preventing the player to just stand inside their own explosions the whole time to dodge the bullets, because thats pretty much what I did haha.
Other than that I think it was a cute little demo, I think its a cool mechanic that you get a jumpboost from shooting!