Mad respect to go for a 3D game for a game jam. The models are awesome, VFX and SFX very very good, I'm surprised at the level of polish this has. Level design is also great and the level is surprisingly large.
Others have mentioned my main gripes, basically controlling the character and the lack of enemies, but that can all be fixed if you continue working on this.
If you want to have platforming elements, I would also recommend to look into jumping mechanics, maybe increase gravity on the way down, because right now jumping feels "floaty". I think Zackavelli actually had an episode on that where he talked about Super Mario jumping and that they had to speed him up on the way down.