To cook burgers, place the patties on the grill and monitor their progress. Flip them when the bottom side turns brown. Keep an eye on them to avoid burning and ensure they are cooked evenly.

Assemble burgers by stacking ingredients in the correct order. Start with the bottom bun, add the cooked patty, and follow with toppings like cheese, lettuce, tomatoes, and finish with the top bun for a well-presented burger.

To increase tips, focus on delivering orders quickly, ensuring high quality in cooking and assembling. Also, customize the orders based on customer preferences for better satisfaction, leading to higher tips.

To unlock new ingredients, you'll need to reach certain milestones in the game such as achieving specific goals or completing a certain number of orders. Continue playing to accumulate points and unlock them gradually.

Managing multiple orders requires efficient multitasking. Follow these steps: 1. Take orders sequentially and note down the specifics. 2. Cook patties simultaneously while preparing toppings. 3. Assemble burgers in the exact order they were ordered. 4. Serve the first completed order to keep customers happy.