Use ranged attacks to avoid being damaged by the donuts. It is usually possible to complete a level using only ranged attacks. Attack as many times as possible, then run to keep safe while your attack bar refills before repeating the process. The best way to move around fast when dealing with enemies, especially Bosses, is to swipe and roll.
Diamonds
Diamonds are the game's premium currency. You will be granted some when first starting, and others can be earned by completing levels. Use them to purchase extra clothes that increase your health. Do not spend them on extra ingredients, as they are naturally obtained through game play.
Donuts
Some donuts, such as the pink one, can cause area of effect damage. Remain close, and as soon as it is getting ready to attack, swipe. It will damage everything around it, usually destroying the smaller donuts.
Launch pads
When you find launch pads earlier in the game, you cannot use them until you defeat the Boss in level 20. You will receive the Chili Launcher as a reward, which allows the launch pads to be used. You can then return to previous levels to use the launch pads to earn three stars at those locations.
Level 25
Enter the room where you have to use the hammer, making sure you have enough energy to hit the three posts that appear. Start with the one farthest from the door and move clockwise to the next post.
Treasure
Destroy grass, chests, and other objects in all areas to collect all treasure and find hidden stars. You will also find hidden triggers by doing this.
Attacks...