I like the art, especially the princess at the end. It was also pretty conceptually well put together, I liked the cave section and the portals mixing up the environment/visual flow of the game.
I'd say that the biggest issue this game has is probably that the enemy hitboxes need to be shrunk. There's a sizeable space before the slime and the bat where the player will die, but the sprites look like they are not touching at all.
In any case, it's a nice little game you put together, nice job on completing the jam!