First of all, thank you for playing our game and giving your input on it!

Falling of the edge is intended, but maybe it happens too often as the map size is too small in later levels. Also, landing on the cube bounces the player off too much I think.
I agree that the punching mechanic needs tweaking based on the reasons you provided. We also planned to make ranged weapons, like a laser to burn eyes with, but didn't manage to in time.
You're also correct about the powerups. After clearing a wave/level you have the choice to pickup the powerup or continue without it (as it can either buff or nerf the player). We also had the option in mind you suggest: hand the player the powerup and he has to adapt. I agree this would have been better, also as it suits the out of control theme more.

Thank you for your thoughts on it!

Thank you for playing our game! A powerup will spawn after each wave/level, but you may not have seen the transition to a new level with the portal as it immediately spawns after clearing out all cube monsters in the center of the level. We definitely need to tweak a few things

Thank you for the interest in our game! I am sorry to hear that our game is being identified as malware, so I understand you would rather not install it for now. We experienced it ourselves as well (and with any UE4 game we previously have made). I will look into it and hopefully be able to fix it. Also, I will publish a web version when submitting is possible again if Unreal supports it.