If you turn off Wifi and Mobile Data, you'll avoid any advertisements.

Since there isn't a distinction between NG and NG+ (i have no idea if there will be), a easy time save would be to do recipes you have already done. You'll skip getting the 3 Stars after every step.

Also please read the rules so you don't get your run rejected.

General Recipe Tips:

When cooking meat (Like Salisbury Steak or African Chicken), hold the spatula thing down on that step. the meat will explode and the entire step is skipped.

When baking, you should go for 3 Stars instead of 2. It takes half a second more, but the screen showing that you got less than 3 stars takes too long.

When Frying, you SHOULD go for 2 Stars, 3 Stars takes too long.

No, you cannot drop the eggs to skip it.

Specific Recipe Tips: For Salisbury Steak Step 2, put the onions and immediately turn off the heat. For African Chicken Step 2, just do nothing. after failing 3 steps, it ends early.