Awesome presentation, very original concept! This feels extremly polished, I can't believe you managed to develop this in 48 hours. I love the Metroid-vania aspects of the game, how you gain different abilities to progress. Also the interplay between the two characters, it felt very intuitive to navigate through the world. Also props for the tutorial area, this is how you introduce your mechanics to the player.
My only gripes are with the controls; sometimes they feel a little unresponsive while high-jump platforming. And the enemies take an eternity to kill, haha.
Everything else is awesome, the art, the animation, the general feel of the game. This could almost be on Steam as it is. I hope you develop this further, this is one of the best I've played so far for this jam!