It starts easily enough: destroy all the unhealthy food and allow all healthy food to drop. Plus a couple of simple recipes (e.g. orange juice on level 4). As you progress, recipes become more numerous and difficult! And in the last few levels, good food must not be wasted nor bad food allowed into the unseen cooking pot!

Tap the screen to launch missiles. Obtain 100% to finish the level. Minus 100% and you must leave!
Bombs will cause damage if they land. Smart bombs (marked with a !) are very helpful if shot (and won't cause any damage if they land).

The free version has 13 levels.
The full version has 40 levels and becomes more difficult as recipes increase in complexity and perfection is required.

At the start of each level, you are shown the required ingredients, i.e. the food that must be allowed to fall. But it's easy enough in the first few levels, just remember to take the healthy option!

Levels are grouped in 3s and you can resume at level 1, 4, 7 etc. as long as you have reached that level already.

If you can't stand the heat, etc. etc. Good luck!