I think possibly it would improve things for the jump force to be increased, as currently the jump does not really propel the character very much. Then secondly would need to expand upon the game world itself, maybe with the camera moving with the player character through a platforming section. With a higher jump force you could add additional platforms to jump on etc. But it was good that you got the tilemaps working properly. I think that with some more time this could have been expanded on to have a nice platformer.