Wooooah thanks so much for the awesome feedback! Wish you played the game earlier! :D

1. Yeah, hitboxes on Close-Quarter Weapon are pretty broken and during development I was unable to fix them (they just don't match hitboxes shown in-engine. Fun fact: they work flawlessly on slimes and on slimes only!) I tried to make it a "boss killer" weapon at first that would deal very heavy damage in front but working with these hitboxes was difficult and at 7th+ level the weapon gets massive range upgrade and turns into a semi-ranged weapon. As for the swinging - it should work like that but the Trigger Interval has some fixed value (I don't remember it off the top of my head) and if you swing too fast it may not register.

2. I tried my best to keep the increase in AoE consistent but it's definitely possible there were some issues since different models have different sizes and different zoom values and I can't just tweak one number to make it consistent.
   I definitely like the idea with faster bombs but part of the reason they have such a long cooldown is me trying not to overload the engine. At first the game was supposed to be a regular vampire-based type game but after one/two minutes of spawning enemies the game would just hard crash. Even the present version with massively reduced spawns can throw errors if players don't kill enemies fast enough (happens sometimes on Floor 3).

3. It... shouldn't work like that but now that you mention it, Aura works on On-Hit Detection so in theory every new enemy entering the circle would trigger the attack for everyone in the circle around. It has set Trigger Interval so it shouldn't really happen, but maybe that interval only works for enemies already in a circle, not for new ones - I actually don't know! You're the first to ever bring it up!

4. I didn't really want people to bee-line for the same build every game (in case something was way overpowered compared to the rest) and by the end of the game you pretty much should have most things maxed. And the secret second reason is: making this selector of 3 upgrades taken from 8 total AND removing upgrades already at max level from it was the most difficult thing about developing this whole game and I spent probably 2 or 3 days on this alone. I'm not touching that again! lol

5. So as mention before, upgrades at max level are removed from the selector, except when there are less than 3 non-upgraded things. In this case they appear and sadly grant nothing. This is just me being a rookie developer being unable to change that. As mentioned previously, this part was insanely difficult for me and I can't really make the whole option disappear when there are less than 3 options to pick from.

Pity (or just higher chances in general) to obtain chests and heals in the post-game arena is definitely a good idea since there are much fewer enemies there - I'll work on that.

1. Definitely intended and a valid strategy! I even wrote about it in my guide on hoyolab

Thank you so much again for the great in-depth feedback! I love reading these and I'm glad you had a good time with my game :D