Overall a really solid mobile game. I really like the idea of the game its very unique i havent seen anything like it before. However, some points to improve are:

- Add a leaderboard / scoring system

- Fix the collsion between the player and the enemy. Sometimes i have died to a red enemy without actually touching it. 

- Possibly add a slider that allows the player to change the speed in which the circles spin. This is an easy way to create increasing difficulty and it also gives the player the freedom to choose how difficult they want the game to be.