I'm pretty sure I got to the end? I found 166 but the only other content about this game is the other guy who gave up almost immediately lol. I saw 173 as well as the big 610 (I tried to beat that guy a few times but it's a little tedious to reload the game every time), but I don't think I ever saw 966, although maybe I can't "see" them.
Difficulty-wise I didn't think it was that hard, although I died a lot on the first (or second?) checkpoint, if I remember correctly that one was really long, with the most branching paths. Something like that might work better a bit later in the level but I went into this game expecting it to be a little hard, so I had fun. The enemy that killed me the most was the projectile guys lol.
I found two different weapons, if there's a third I missed I'd like to go back and find it! I like using different weapons, but I didn't really use/care about any other items, so I don't really have anything to say in that regard. The Light/Heavy attacks felt good (sound effects didn't sync though, although it's pretty obvious most sounds are placeholders), I instantly forgot about the parry also.
As for my game, I've been chipping away at it for the past year. Its still not in a very playable state mostly because the gameplay loop is super weird and ambitious & it's also my first 3D game. For a bit now I've been thinking about making a smaller proof-of-concept type game in 2D with a small enough scale that I can actually put it online and get feedback. It was actually finding your game that really gave me the motivation to start working on it, so for that I have to thank you!
Two days in, and it's going well! I hope to get it finished in a month or two, so that means it'll be done in a year lol. Anyway, I'm excited for Permafrost's next update, love to see what you add!