I like how the tone feels so far! The visuals are quite nice, and the contrast of darker environment/UI with the somewhat silly music and dialogue make the dark humour work well.
I think the tutorials are a really good start, but there's some dumb small things that confused me. Starting room: I tried multiple times to push the cube, it didn't work, I gave up and figured that wasn't the solution, ended up pushing it by accident (it seems only a specific corner of it really works?). I missed the sword chest initially and thought the combat tutorial was bugged, so you may want to stop the player from entering the next room before they pick up the sword.
It would be good to be able to close the equipment and spell menus with a key press, as pressing on the button every time doesn't feel so intuitive.
You'll probably add more enemy types and vary them in future updates; that'll probably make combat a lot more fun, as right now it doesn't feel bad but it is a lot of repetitive clicking without needing to really think. I do like the idea of the enemies getting dazed on the ground and being able to get back up if not killed in time, I think when you add more enemy types (especially some that are faster and the player would more easily get overwhelmed by), it'll make the player have to be strategic with who they take out first.