Space or tap to float up. Dodge the birds, clouds, umbrella things and the top and bottom boundaries. It starts out very trivial, but it gets harder the higher the score is, and you get more types of obstacles too. Note that you only die if the main body touches an obstacle or the top or bottom; just like the original Floaty Cloud game.
@ComputerCole - original project @carot3 - my logo Google for the original floaty cloud game (I had to remove the shop and the highscore system because it made everything too laggy)