Use WASD or arrow keys to drive your delivery truck. Customers wanting donuts will show up on the mini-map as a yellow dot.

When you are next to a customer who wants donuts, press Spacebar -- once for each donut. When the customer is satisfied the yellow dot will turn green.

We didn't get one of the core features implemented in time. The plan was to have a police car who would follow you around, pull you over which of course would slow you down. You could "sacrifice" donuts to the police officer ... but then you'd be short and unable to fulfill all your customer's orders.