The Jolt physics engine is great. I also used it in my game.
I was really proud of myself for not falling into the dreaded "scope creep". I actually ended up expanding on my original idea when I found an extra day or two! It definitely didn't come without incident though. My dev log shows a pretty drastic morale swing when I was struggling with some UI elements (the HUD specifically).
I only had the knowledge and capability to test my game for the Quest. I'd love to figure out a way to at least emulate other systems so I can be more confident in their release builds. Speaking of release builds, I only uploaded debug builds because my release build process was missing signatures and keys. That seemed like a task that wasn't going to get done in time for the deadline, so I didn't even attempt to fix it.