The art was super good, the green slime/acid on the floor did sort of bother me though, with the rest of the assets being so well made it felt out of place. The gameplay was actually really fun, the movement was super fun to fly around with and the game was long (in a good way), i didn't finish it eventhough i've been playing for quite some time now. I disliked the world flipping, i understand what you were trying to do but with the physics and mechanics staying the exact same, it was just sort of nauseating and didn't add anything to the gameplay.
Amazing job, well done the four of you!