You always start in the lower left corner, a flash signal will show you which cell you start with. You grow your Hexagon by clicking on a color at the bottom screen. The cells that you own and all the cells that are touching your Hexagone will change to that color. You only have a set number of attempts to fill the screen. If you fill all the cells before you run out of attempts you will get 100 points plus you will earn 10 points for each attempt leftover. If you fail to fill the level no bonus points will be added. Your score will also advance based on how many cells you control each turn, 1 point for each cell you control.
Use the menu to start a new game (score and Best Beat attemps reset) or to turn the sound on and off.