honestly didn't agree with others that the levels were difficult, basically all were easy tbh. level 10 is pretty elegant though, i think you should try to polish the game even more to make more levels like that. having only 2 real levels with multiple balls also just seems like a waste, especially considering that the two balls didn't really interact with each other. definitely more potential here, and even more if you're willing to make the levels large. currently brute-force is viable