After a few weeks spent trying to make the GUI as much simple as possible , I started the creation of the stages. I created the first 20 levels .
the goal is to move the three circles with a swipe to absorb the balls of the same color .
[edit]: i have already removed the "+10 coins" on the rating button. i was told it's illegal

CURRENT FEATURES:
-falling balls can have different speed and they can appear with different frequency
-sometimes there are black balls that you can't absorb. clicking on the circle will close it stopping the black ball
-in some levels two falling balls will switch their position (in general they just fall down)
-two different power-up will help you during the the game(in some levels they are indispensable and you will find them during the level. you can buy them in the menu scene if you can't finish a level)
AND FINALLY
the game logic is very simple and i just want to know if you all have some advices to make the game more interesting
-i was thinking about falling balls that become invisible at a certain height
-or a some kind of teleport that changes the column of a ball
please if you have any ideas write it on comments

thanks