Thanks NLAigis! I really enjoyed watching the video!
I agree that the controls need fixing, and if possible I will change the controls in a bug fix. If not, then I will definitely change the controls (and add configurable controls) once the voting period of the jam is over. My apologizes that the controls caused so many issues for you, especially right when you were at the end of the level.
I am not sure on what is causing the 2D character getting stuck, but I will look into it!
Unfortunately I cannot fix the 3D camera angles until the voting period is over (as personally I feel changing the camera angle does not count as a bug fix), but after the voting period is over, I will look into finding a better camera angle.
As for the 3D lighting, I'm not sure what is causing the problem. The light used is a directional light (Godot's version of lights like the sun) attached to the scene, not the player. However, it very much looks like it is attached to the player on your video. Do you mind sharing which OS you were using to record the video? I developed the game on Windows 10 64 bit, but maybe I missed something... Regardless, I'll look into it!