This game's animation is really good. The background not being a still image is impressive and the player's jumping is cute and fun. The idea is innovative and the game is challenging. It's also impressive having three different bosses each with different designs. The only things to improve on in my opinion is to add checks so that boxes can't spawn in the player (which got me stuck during a playthrough) and spikes can't spawn next to each other making it so it is impossible to get across without taking damage. The audio design is very good too. Very nice job!