15) Use the dashing move.
The dashing move will help you avoid attacks, as well as move faster, and it will also do damage to the little donut holes. Dash by swiping in a particular direction. Master your dashing, as this will help you beat all of the bosses, and whenever you get stuck in a wall, dashing will get you out.
14) Spend your crystals in order to find better armor.
The type of clothing that you are wearing determines what your armor bonus will be, and the higher your armor bonus, the less damage that you take whenever a donut hits you. Use your hard earned crystals in order to earn that armor bonus. You can also use them to restart a stage after you lose, but that’s a very quick way to waste your crystals.
13) You can also spend crystals on ingredient gift boxes at Stewie’s house.
Ingredients are separated into different rarities – common, rare, special, super and Smosh. The more expensive the box from Stevie, the better the ingredient that you can earn from it, although you can only earn one ingredient at a time, so your best bet is simply to grind for more ingredients in stages instead if you need to get more, especially the ones of a lower rarity.
12) How to get rare, special, super and Smosh ingredients for free
Grind for them in stages that you have already beaten. Certain stages are predisposed to earn you specific ingredients when you open boxes, and the farther along said stage is, the rarer the ingredient that you are likely to earn when you open a gold box. The more gold boxes in the stage, the more ingredients it will contain.
11) How to unlock the two new difficulty levels
Beat the game and earn 60 stars and you will unlock the second difficulty, which is Sorta Hard. In that difficulty, you have to beat the game again, AND earn all 90 stars, but when you do, you will unlock Hard as F**K! in the difficulty level selection list. Higher difficulties tend to have better coin, crystal and ingredient rewards.