Waves of donuts are inbound and you've to slice them all up with your arsenal of knives.
Be careful not to hit the bombs which sneak into the waves. Bombs are trouble!
Once you clear the waves, it's time to fling as many knives as you can at the big bad bosses.
Don't hit the knives and bombs which are on them though.
Beat the bosses to pick up the super-special Boss Knives.