Blow three times to fill the bubble (tiny, bigger, full). You start floating on the first blow.
Fourth blow: hold to steer left and right. Let go to drift down.
Fifth tap pops the bubble on purpose.
Kissing the top of the screen leaks air. It does not pop.
Grab the gold star on the last ledge.
On a keyboard, press Space to blow. Use A and D or the arrows to steer.
On a phone, TAP TO BLOW BUBBLE. Hold and steer with two fingers.
LV 1/4