I didn't get to read the message at the end because it kicked me to the main menu immediately. Also never figured out "frags" and only just learned about it from a post here.
So, for the first long while of the game you can just sit in the corner and mash to win. The later enemies obviously prevent that and I didn't figure it out immediately, but if I were to play the game again I imagine I'd just be standing in a corner shooting the corner for two dozen rooms before the other enemies show up, so the game is neat I'm not sure how replayable it is since you can't really rush through it.
also good sfx/animations/whatever feels legit