All true probably. I experimented a bit with post processing, but came to conclussion that clean works best. At least during my quick research, because godot is quite lacking in this regard. I would like more to give some effects to the textures, specular maps and so on but well... time. The music and sounds will be there next time hopefully;) Shadow should also be there though honestly you don't have to do that much precision jumping in game, most probably its the bombs that caused you problems. They make the jumpings tricky for the most part, lava is mainly only in the first level, its not a one hit kill and respawn should be close. Though I agree it could be done better and especially shadow is a must.
If you could provide more feedback on camera it would be great, because few people didn't like it, but i have no idea what's wrong. Unless people are simply not used to 3d platformers anymore;) You played with mouse or gamepad? I just think I need to implement speed and invert settings for looking around.