Chase down the teacups to practice mulitplication!
Press M or hover over the word menu to open a menu. There you can unstick cookies, turn sound on/off, change how you control the flyer, and turn the safe zone on/off.
The safe zone is the area at the top of the screen, that the teacups don't enter. Turn if off if you want the teacups to collide with your flyer.
Most unmatched cookies go back to the crate so you can try again, but the Unstick button is helpful if the teacups trap them or you just get impatient.
Switch controls from the menu. Use the on screen green arrow buttons to fly (and the button labeled "drop" to drop), or switch to keyboard and use arrows keys to fly and space bar to drop.