First option is to click on software arrow key left and right or, secondly, to lean your device to the left or right. By doing so, you are making sure monkey always gets his feet on the solid platform. You 've got only once chance. If he slips off or misses the platform, he falls through all the way down and the game is over for you. So make sure to concentrate for the best result. I'd say this is much easier to play on mobile than on regular pc. Just make sure to click or tap on the given option correctly. If you choose to lean device, you won't be able to use arrow keys and vice versa.