These cubes look really funny. Falling off the edge makes it kinda hectic, not sure if it's intentional or not.
I believe the punching mechanic could use some work as the enemies were damaging me while I was punching them. Also, seems like you can just avoid picking up power-ups, and I believe you don't want it as a developer: you want to make players adapt to the changes caused by these powerups IMO.
Overall, good job!
P. S. I dunno about malware thing, but at least there is a game. Itch app didn't show me any warning about it.