I have deleted my comment in lieu of something more constructive:
The core gameplay loop is simple but works - collect items, get out of there. It's possible to cheese the monster by moving backwards and not looking at him at all. Maybe instead of static objects they could be moving, presenting a challenge - or an in-game timer could entice speedrunners to compete playing the game the fastest.
Even though you claim the art isn't there, I very much enjoyed the minimalism - to me, this is a slime club, and maybe you could lean into the theme. That could relate to horror a bit btter - a bunch of slimes were on a night out, one of them left their slime wallet (full of adventurer bones used for currency), but there is one dude out there that knows your scent and wants to grab you.
I liked the music, but the sound effect for looking at the monster blends into it too well. For my first few tries I was certain the sound cue was part of the soundtrack. Maybe make it a bit more distinct, like a static sound that makes the music more hushed.
As far as I understand this is your first game, so good job on that! Please keep making more :)