There are six target keys in the game: 1, 2, 3, 7, 8, and 9. Have your fingers ready on those keys when you press the green flag. Pressing those keys will set that key to destroy. This will destroy any Crasherballs that touch it. Make sure you don't let any falling balls past the target keys, or you lose. Press 0 to pause or unpause. Simple, right? Or so it seems...
Just a quick game to show that I'm not that inactive on scratch.