Awesome game. Played through it three times to try and get the highscore, didn't quite succeed but I was close. (This makes it the game of this round I've spent the longest time playing by far). I really enjoyed it, so many good design decisions. You've managed to make the game very approachable, I've struggled with keeping all of the buttons in my head on some other games but this felt super intuitive and a joy to play because of it.
Only complaint I have is that since the game is keyboard only during gameplay, I wished I could pick the upgrade with A/D + Space instead of having to move my attention to my mouse. (Aren't the mice the enemies anyways, we shouldn't join their side)
It felt a lot of fun out ranging the sword enemies with my even longer swords (that was my favorite character btw). Well done!