Great game, it was fun.
The graphics fit the game well, the audio as well.
The UI can for sure can be better and a main menu and pause screen will be great as well.
I was talking to SirSnipe on Discord while playing and I don't think I could finish the game without him, you need to write somewhere that the Space key open the inventory and Shift make you sprint (Love the animation of the sprint xD) and just make the game a little bit more easy to understand.
Also when I died I didn't understand that until he told me that I died and what I did wrong, I think writing what is the reason the player died (What the player did wrong) would help understand the game and not repeating the same mistake.
Oh, and about the note pad, maybe just make a note pad in the game ;)
I know the game is still on prototyping so other than that I think this game is a great puzzle game and I can't wait for you to release it :)