I enjoyed playing through this game and thought the upgrade progression was fun. I can always appreciate a bit of an Inception moment.
I usually like to provide two critiques, so I will :)
1. The punch attack animation needed some love. The first thing I think (and take this with a grain of salt because I'm not an animator), is that the punch itself should happen in 1 or 2 frames and the retraction can take longer. Right now it's the opposite which makes the punch feel weak.
2. The alien survival part quickly becomes impossible after a minute. I was able to survive a bit longer by cheesing it (going back into the house), but not even that could save me.