I really liked the concept and the gameplay! I agree with others about the resolution - what I experienced was the entire game did not fit in my screen, so in order to get my mouse to the edge of the screen I needed to pan my browser manually. Maybe the resolution wasn't correct when submitting to itch or something? I think the black hole types could have been more visually distinct, as even after the starting levels I had trouble figuring out which was which. But apart from that the game was great, it did so many things well like mechanics, sound, etc.