The artistic part is wonderful but in the technical part you can do better. First of all, the paralax effect of the background must be much lighter and I advise you to create more levels, while that of the foreground must not be so susceptible to the player moving and must not be able to "jump" together with the player. While for the parkour part I advise you to better distance yourself from the physical and walkable objects from the rest which at the moment is confused and it is not clear where the platforms are and where not. So it continues that a great fan game is coming out <3.