I played half-way but my highest suggestion would be to not talk so condescendingly to players by over-explaining literally everything or having the character monologue such dialogue that is both empty, as well as insulting with the level of hand-holding that happens in the game.
The Knife, gun, ammo, explaining how the holster/unholster mechanic works, explaining how to use an elevator? I expect this level of condescension from AAA devs, not from indie devs. The items are shiny, stand out, but you still 'tell the player they should pick it up' at every chance as if you expect players to be idiots. Don't do that. lmao
Like I swear, the 'Guide of how to use the gun' was 3-4 paragraphs long yet all it was, was 'Right click to holster/unholster', 'Left click to shoot', but you found a way to take that basic mechanic and Over-explain unnecessarily.