Let the wind get to 9
Press the mouse button, and again to hit the kass.
Hold down the button until the kass reaches its peak height, then release it.
As it lands, press the mouse button again, until it lands, then redo it.
Basically, by holding the mouse button, it prevents the kass from flaping, thus making it more aerodynamic !!!!!

**note from musky_dragon: if the wind isn't in your favour, click and let the kass drop to the ground then restart