I think this has a great foundation! The movement feels good (I would love some coyote time and faster shooting), but I have no critiques from a gameplay perspective.
Now, as an audio guy... the OST is very repetitive. This isn't inherently a bad thing, but if its repetative, you have to make sure that the player doesn't get listener fatigue. Right now, the loop feels very exposed. Because the track doesn’t evolve much over time, the player becomes aware of the repetition pretty quickly. One way to address this isn’t just adding more songs (though that would definitely help), but also introducing variation within a track. Things like vertical layering, subtle instrumentation changes, or interactive elements that respond to gameplay. Even small changes can go a long way in making a loop feel alive.
However, I would recommend changing the genre (or style) of music. I think a long 10-minute ambient track would be perfect for this game, to match the wasteland that is outside THE BOX. More tracks with distinct styles would also help break things up and give different areas or moments their own identity. But I would be tricky, as this game is one area.
I’d also love to hear the sound design pushed a bit further to support the gameplay. Things like footsteps, jump and landing SFX, and more environmental interactions are opportunities to reinforce feedback and add texture.
Overall, the foundation is solid! It just needs more variation and responsiveness to really elevate the experience! (holy yap. whoops)