For a first platformer its really good! If it had checkpoints or if we restart at the start of the level then it would've been perfect. The art and audio you used gives me such a cutesy vibe and the inside world area felt so cool! I also like how you even showed elements of the inside world coming out. The cutscene in the beginning and the scene transitions were a nice touch too, just wished we didn't had restart the whole game after missing a jump.