I see that you are using Godot too! <3 And really happy to see the implementation of Godot Jolt here.
Just like you said, if I rename the .dll the physics just broken (in a funny way) 😅. It's really fun to learn how physics engine extension works.
For the game-wise, it's really cool! The 3D looks well polished, and the movement/look was really nice! I really feel the Portal vibes when playing the game.
A small feedback: probably just me but I hear strange buzzing sound throughout the level. It might be couple of stuck object with collision (?) but I'm really not sure.