This is a work in Progress. I will add more areas as I can.

Here's a rough explanation of the route that I've been taking, along with a few tricks I've figured out along the way. I'm going to scribble on screenshots, hopefully it is legible. This is the route I use for no items run. Runs with items can follow a lot of this, but will be able to cut corners depending on how many items they have. The names of the areas are arbitrary.

You can follow along with this video:

Opening:

The first area has exactly enough food to get through the first door. Zig and zag and grab all the food leading to the food at [1], which will make you fat. Dive into the bush which will instantly make you fast again. Grab the rest of the food then run back to the lock at [2]. Then immediately loop around to the bottom side of the guard and then up to the gate behind him.

Glitches: I've noticed two glitches with the guard in this area. Sometimes he just does not spawn. Sometimes he starts his route early. Usually you can still run past him and then he will go back to where he spawns. In either case you can go directly through the gate instead of having to loop around the guard.

Note: If the guard sees you, you won't lose any time but the next area will be harder as you try to avoid him.

Beach:

This area is straightforward except for one thing. There is not enough free standing food to get through the gate. You have to scare both birds at [1] and hope that at least one of them drops 2 food items. If they both only drop 1 food, you will have to wait for food to respawn to get through the gate. I typically just restart the run at this point if the birds don't drop enough food. If the birds drop enough food, you can usually miss one or two oranges and still make it.

Sundae:

This area is straightforward also. Make a beeline to the sundae while grabbing two item boxes along the way. You don't need much more food than that. You can outrun both types of guards in this area. If you get seen, just juke around the beach chairs to lose them. Make sure to go through the farthest right gate. Do not go to the cheese area. The cheese area is an optional diversion.

Caprese:

Loop around the bush and collect the nearby food from the crates. Grab the zeppole and the item box and head up the stairs. In a newly reset file you will get a prompt showing that you got a zeppole. Double tap confirm to close it.

Run past the guards and grab the pizza. Dodge into the bush to avoid the guard's gaze. If you plant yourself on the ground between the two chairs at [1] you can eat the caprese salad without any guards seeing you. Think briefly about how a caprese salad would make a nice lunch some day, but never actually get one for lunch.

If you still need more food to get the key, go up to [2] and eat the food there, as well as what you get from bullying the NPCS. Avoid [X], the gate to the fish area. If you accidentally get too close and waste your key on this gate, the run is over. Go instead to the gate heading north into the plaza area.