Hi!
I feel like the game has a nice idea behind it, but there are many things that prevented me from truly enjoying it. First thing is the lack of feedback and the unclarity of some things: the spikes do not have any animations to know they're about to pop, the green slime thing looks more like an enemy than a thing you want to collide with to collect your stuff, the holes collisions are very punitive and don't just remove one health but one shot you (which is understandable as they're holes, but since the hitbox is not very generous, they're quite frustrating), some rooms have a bottom exit with no door, etc.
The last thing I'd like to point out that really disturbed me was the gameplay of the boss: during the all game, you play with WASD/space/shift, and the boss requires you to click on buttons, with limited time, which is very weird and made me die to it without understanding what was happening.
To talk about positive points, I liked the initial narration with the key bindings explained with the "meaning of alphabet", I think that was a nice touch. The rooms navigation/roguelike structure of the game is basic but very easy to understand, which is what you're looking for in a jam game so that's a great point, and the character controller is responsive and the controls easy to get used to.
I feel like a bit more time to polish the game would make it become a pretty nice prototype! Congrats for making the entry!