Very nice game. I will admit you had me confused at parts where you had to figure out where to use the rolling mechanic. But this is genuinely a good game, would love to see more levels added. The only thing I would nitpick is just how slow it takes for the rolling animation to charge up, maybe some visual indicator or something when you press down arrow would be nice. But other than that this is a very interesting and fun puzzle platformer. Very serious too, of course.