its 2 buttons, holding the left side of the screen and holding the right side of the screen. There is an unfair lack of transparancy in the control scheme (which wouldnt be that bad if i actually decided to make a proper how to play screen)
Okay. You should add the controls in the description on the game page too.
I couldn't find out the controls to sort the green items in the middle so I would just lose everytime a green item was there.