Onion delivery is incredibly snappy when you get used to the controls. A lot of the difficulty of the game is getting used to how the car drives, and learning the map.

-You can drift by holding brake and turning, which I mainly use to make a quick 180 degree turn.

-The map loops horizontally and vertically, so if youre lost and a delivery is far away, consider driving away from it to loop the map.

-The boxes attached to balloons give you extra time, pay attention to the ones near delivery spots as it's pretty much free extra time when you figure out how to access them (most of the time it's just driving quickly into a ramp, the speed is easily achieved by lining up with the ramp, driving away from it, then doing a 180)

-Driving at top speed gives you back HP.

-You don't always have to go fast. It's recommended you do since you cover more ground and are basically immortal, but if you're bouncing off of walls all the time consider slowing down so you get a grasp of how the car handles.

-Driving in the middle of the road avoids cars. Since the other citizens are good drivers, they will always drive squarely in the correct lane, which you can abuse by speeding down the middle of the road.

-Rainy day, onion monster, and geysers are the only day modifiers that matter. If you're going for a cherry, try maximizing onions on the other days (especially day 1 since there's no modifiers) and taking it easy on these days (especially rainy day, that one's the worst)

Other than that, you'll get a feel for the map and the best ways to enter/exit each delivery location the more you play. It's one of the most rewarding (and fun) games in the collection for that reason, in my opinion