It's challening, but it's extremely fun. I could play this for hours, but the olny thing that annoys me a bit, that there aren't any setting to turn down the music since it kinda destroys my ears. But I get it since it was created in olny 3 days, otherwise the gameplay loop is really fun, the little swirling blackhole (or whatever it is) is also nice, since it help's with destroy the balls. Great game!