Glad to see this got an update. Great update, too!
This is my favorite game in the jam so far. I've been doing a few runs every day. It's just really fun.
Best run so far (before the beta 2 update): got a few waves with onis. Mid 10s.
Best (and only run after the update): Wave 22.
The ending screen already makes a big difference in letting the player track their progress. You could probably add some more stats and maybe keep track of various high scores to make it an even more complete experience.
Favorite weapon: Desert Eagle. After the initial mayhem of a new wave (where the gohei works wonders), this is my go-to weapon for cleaning up. The long range and decent damage per bullet makes it feel like every hit matters, and it almost never needs to reload compared to the higher power guns. I feel like the shotgun and machine gun probably need a slight buff to be at least as good as the deagle.