Yeah that wall clip. Something with those colliders in Unity. Full enclosed, but still somehow you can squeeze through.
And I think getting the level done is not you lack of skill, but that it's indeed hard and not such a good implementation of the player movement.
This was just a small little getting back into making a game quick, before we start with a big project outside of jams. So we probably will not put any more effort into this.
Thank you for trying our submission!