A free program for Android, by Bubble Puzzle Games.
How to play?
The goal is to clear the screen by rotating and moving the colored blocks. There are no rules or restrictions on how you can move the blocks, just be careful not to bump into other blocks or the edges of the screen.
The music is very relaxing and it helps you to focus. It's not very difficult to play, so even if you don't have much experience with games, you can still play this one without problems.
The graphics and animation are very appealing, and the music is relaxing and will definitely help you to have a good time.