Wow, that is really great & detailed feedback! Thank you so much for taking time out of your day to write it out for me, this will definitely help make the game better!
I'm going to fix the movement keys for keyboard & mouse so diagonal movement works smoothly, and a few other tweaks as well. I should make it so you can still punch when other items are equipped in your active slot, that would feel more natural. The FPS drops are something I've been looking into - they are tied to the lighting system, and I think I have a good solution but have to test it out a bit, that's a big on my to do lost. I might need to change up the intro area so players can go back, right now if you could you'd be able to get endless weapons/ammo but I can change that up and should. The permanent stamina/health drops are actually a feature of the game - As you lose stamina/health you'll slowly lose MAX for each and have to eat food or use medicine to restore them back, I need to find a good way to explain that system to players though. The bumping issue that messes up the camera still needs work also, I think I can fix it easily enough - adding it to the bugs list
Thanks again for playing my game - I hope you like it!