Very simple but I liked it, the music and vibe was very chill so I just took a minute from the hectic life and just rotated the circle around :D
Sometimes got very tricky so that you had to choose which you will let crash the circle. Obviously that adds a strategic point to the game as well and some difficulty, but as a perfectionist I didn't enjoy them having to hit the circle (when there was no chance of turning it around fast enough) :D
I enjoyed it though, and if only in 48 hours then a really good job as well!