Congrats for making a game for the jam! I was able to find the orb for the fire/lava orb. Things got kinda messed up when I went into the earth maze though as the colliders and meshes weren't lining up, and I was having to deal with invisible walls, while heavily motion sick.
I had a really tough time with the locomotion/turning with motion sickness so I had to quit before I got too sick. The locomotion acceleration curve in the game was really tough to stomach. With thumbstick locomotion, you really need to deactivate all acceleration with the movement, and just have it be still or moving at a fixed velocity, to reduce motion sickness. Also, a snap turning option would help for those who are not turning in person. Here's a helpful article on reducing motion sickness for your players in VR.