The game can be summed up in a real easy way: you have pixel art images that must be completed by managing some neon-colored cubes that are constantly appearing from all sides of the screen. You must manage these cubes to complete the image. Mechanics are rather simple: catch, drop and rotate the cubes and rotate all the screen.
But as you progress you start to face increasing challenges related to the limited time, the management of the cubes, the frequency of the cubes' fall, etc. But there's no use on explaining this: go play the game.
By minute 1 you will say “hehe, this is stupidly simple; but by minute 20 you will be fully engaged and screaming “damn! I didn't think of that! Let's re-start this level AGAIN!. Believe us: you will end admitting that Cubotrox is a masterclass on “easy to play, hard to master.