I'm loving the nostalgia! After the Sega Genesis, the PS1 was my first real love hahaha the design and feel of the game are great, it felt very fluid. I was enjoying my playthrough, but then I accidentally climbed over the boxes right by the numbers on the wall, and got stuck. By that point, I was a little over 20 mins in and did not feel like restarting. Did I miss out tho?? I'd give it another shot if you feel there's more I need to see, but it's a jam game, so I figured there wasn't. I'd suggest adding a mechanic to either climb out, or not be able to walk over the crates to begin with!
Great work!