Some people spend their free time mastering new skills: Swahili; the piano; embroidery. You know the type.

I play a game on my phone called ‘Kebab World.’ It’s taught me more than any of the above ever could.

In Kebab World, you’re in charge of a fast food joint. And when I say fast, I mean it. Especially as you advance through the levels.

It’s a one-woman operation. You’re in charge of cooking the chicken, preparing the salad and maintaining the drinks machine. And of course, keeping the customer satisfied.

It can get pretty stressful! But it’s in times of adversity you learn the most. Having made it all the way to level 27, I’ve acquired a fair few life lessons along the way. Apply the following hard-won tips to your own life for a happier, healthier you:

You can’t please everyone! Sometimes, when my kebab joint gets really busy, the customers begin to sulk. Their expressions become dour, and – sometimes if you’re not quick enough – they walk out before you’ve finished preparing their order. Of course you don’t want that to happen! But if you’re doing your best, don’t sweat it. Focus on pleasing the customers who still have smiles on their faces. You’ll make your losses back in tips.

Cut your losses! If you mess up an order, don’t hold onto it in case the next customer wants your messed-up meal. Assume no one will. Bin it and move on.

Invest in yourself! If – like me – you are naturally frugal, this may be the most important lesson you learn. As you make money in your kebab shop, you’re given the option of upgrading your operation. You can buy a new Ayran dispenser, or invest in an additional grill. You can even buy larger quantities of parsley to give your kebabs a healthy twist. Do it! As well as enabling you to work faster and more efficiently, the upgrades will keep your customers intrigued. Meaning more tips, and more money to invest in exciting things like additional serving space.

Rest and recharge! Sometimes, when I’m on the U Bahn home from work, I subject myself to a second shift at the Kebab joint. This is rarely a good idea. Without a clear head, it’s impossible to make smart business decisions and offer service with a smile. Double-jobbing is a no-no. Go to work well-rested and motivated, and before long, you too could find yourself in command of a kebab empire.