This is an incredible game!
I think, when making videogames, design means everything and you nailed it great. Your mechanics are well defined, your character's abilities are clear and everything on screen was easy to understand. Even if your artstyle is minimalistic, it works great as it is consistent the whole time, that's what allows the player to keep immerse in the experience.
Your music selection was great, but the song of the first sections made me feel a bit tired. Keep the consistency with the elements of your game, some switches needed me to press the F button to turn on but other didn't, it was confusing the first time I played.
There's a lot of potential in this game, so don't loose this idea, maybe something cooperative may work great. ¡Hicieron un gran trabajo!
Pd. You two have really cool usernames.