Nice little game with a good "old school" feeling ! The gameplay is working, and I didn't encountered any game-breaking bug. Figuring out what to do and what were those things in the UI was a hard time, but it finally went pretty good after a few minutes (I still needed to recheck the keys 2 times).
I couldn't finish the game, but with a little more playtime I think it would be less a problem. Maybe I will give it another try later on :) !
Really liked the music btw, really fitted the theme. And the pixel art assets were nice, even more for a first released game !
Here is some things from my playthrough that could be useful to you :
• I'm european, and I have an AZERTY keyboard. It is often underestimated, but it could be an instant stop for someone that don't have a QWERTY key configuration installed. Luckily I had one. On your main menu, making a click/space bar switching between the two key configurations won't take too much time and could be useful for accessibility.
• I think you already know it, but a few sound design could be a cool addition in your game. If you want to create your own, BFXR is quite common for a lot of pixel-art jam games.
• Like I said, I had a hard time figuring what is what in the UI. A little sound effect when picking pick-ups will lead to a way better understanding of the UI, for example. Joined with a temporary white outline around the UI square where the item is stored, I think it will be really efficient.
Of course, this is my own opinion, and I think you would figure out other things while letting the others play.
Sorry if it's obvious for you, but don't hesitate to make your relatives play the game : casual players will have a really different approach than an experienced gamer/developper, and it could help pointing the flaws in your GD/LD/UI designs.
Well overall be proud of you, that's some nice work for a first released game !