Greetings Jashinn, what I've played of your game is excellent; it's undoubtedly superior to the previous game. I'll be happy to buy the final version, and to that end, I'd like to offer some feedback and ideas to enrich the game.
In my gameplay, I haven't encountered any serious bugs, only some very minor modeling issues, but I think you're aware of them, so I'll skip that part.
1 - Improve stats. Something simple like the health bar, walking speed, or melee damage. These stats can be obtained by letting yourself be "attacked" by a specific monster. Upon reaching the climax, the specific stat should increase.
2 - Add special weapons. To avoid monotony in the gameplay, adding unique weapons can make it a bit more engaging and won't drastically change what you've already done. I was thinking of: crossbows, chainsaws, tasers, miniguns, katanas, etc. You don't have to choose them all, just the ones you like.
3 - Add special sections. I left this point for last because I think it's the most difficult to implement, but add puzzles and minigames to certain sections to give the gameplay more variety.
That's all, thanks for reading.