As others have mentioned, completing the tutorial level disables mouse controls on the main menu and you have to exit the game to fix it.
Cigarettes don't reset. After I used them all up on the tutorial I was permanently unable to heal for the rest of the game. This is true even if I exit and restart the application. I used them all up on my first tutorial playthrough so I'm not sure if something is being saved or if it just being set to 0 for whatever reason.
The boxes on the ground don't seem to do anything when I touch them. They didn't heal me or refill my ammo or cigarettes.
Dashing does not feel very good. I think it would make more sense to use the shift key here. The way it quickly tilts the screen makes me a little nauseous.
A lot of the guns kinda suck honestly. I only found the SMG and shotgun worth using. Pistol takes too many hits to kill and has so little ammo. I enjoyed using the katana but it could use a little more range.
I gave it an honest shot but I couldn't get passed the first red door since I'd always get filtered by that one massive room with a metric fuckton of enemies all over. Didn't help that I couldn't heal lol. I'll make sure to give it another try after you update it a bit.