As people have mentioned in some comments, you shouldn’t be so hard on yourself, because the game you made definitely has several elements that deserve recognition and prove your skills as a developer.
The first thing I notice as an artist and dev is that even though you may not have advanced knowledge of art, you managed to maintain a harmonious atmosphere between the larger areas and the more zoomed-in ones. It really felt like everything was part of the same environment, and even better, it gave the impression that it was the object in the environment being viewed from a closer perspective. Sure, there’s room for improvement in composition, like the toilet water, but I don’t think you should worry about that right now.
The second point, and the most important, is that I’m terrible at escape room games, but in your game, I was able to easily figure out what needed to be done to get each item and progress a bit. Of course, some things were slightly confusing for me (maybe it’s my amateur escape room side), like the correct order of symbols to open the small box on the table. I noticed that you made the symbols on the walls stand out, which is great, but you could add more complexity, like randomizing the order of the symbols and indicating to the player whether it's the 1st, 2nd, 3rd, or 4th digit through another object in the room (like plaques, for example). I hope that example doesn’t sound confusing haha.
And third, but not least, you managed to deliver a good game even without sound effects and background music. That’s really impressive because sound is a fundamental part of the user experience, but even with its absence in your game, we can still feel the atmosphere through the interactions.
Yes, maybe there were time management issues, but that happens to everyone, even the most experienced. So, take that as a lesson, and next time you’ll be able to better decide what to cut or keep in the game, being aware of your own pace and adapting the idea accordingly based on the time left.
Congratulations on the game! Keep up your effort, and you’ll undoubtedly create amazing things. Good luck in the jam!