Hey, I was close to recording it as a WR but never done it.
Here is the route:

Map1:
1. Collect every food that is where you start. You dont need any more food on this map.
2. Go collect Iron, Stone and liana (up the hill and then right)
3. Create the tools you need: Axe, Hammer, Shovel
4. Build shelter -> Fire -> Storage -> Treehouse
5. Go the place where you have to dig. On the way to it collect the cotton.
6. Skip trough the pirate scene get a parrot then new pirate scene and do all the tasks
7. Start with the turtle, then the wine and finally the monkeys
8. Dont kill the monkeys just run to the pirate and you will leave the map, you will most likely die but you will revive on map 2
Estimated: 30min

Map2
1. Light the torches with the firestone in the pirateshut. Then do the stone task
2. On the next day you have to catch the paper in the water.
3. Go from the water directly to the stone while picking up one shell or any random quest item.
4. Do the stone task but just put one shell onto it. Then spam the use button.
5. Again, you will die but no worry you are on Map3
Estimated: 10min

Map3
1. Collect the weapons
2. Collect all the stones and leave the map
Estimated: 5min

Map1-3 estimated: 45min

Map4 :
1. Collect stone on the left. You need to create all the tools with it and 6 irons for the last map
2. Go to the two wheats, collect everything. Go to the cotton and yarn it(just as many as you need. not everything). Be aware to not trigger lions aggro
3. Create the shovel go collect the treasure with the yarn in the water.
4. Go to the headland with the Bananas plant the wheat
5. Create a rod and go fishing until you are nearly dead (hunger and so on dont let you get shoot)(the fish is your whole food)
6. Sleep then next day do the Grandpa tasks and the tasks to get into the village. Collect all the hemp you need.
7. Go fishing again until you have 50 skill
8. Collect the Bananas finish the villager task
9. Create the fish traps but be aware, that you get your wheat once it is ripe.
10. Place your wheat in the village
11. Collect all the stuff you need that is in the village
12. End the hunger tasks. Pass the time until the wheat has finished by jumping and sleeping then
13. Depending on how risky you wanna be, save, so you can reload if the crickets are coming.
14. Bake all the breads finish all the task, clean the beach and wait again until they have done the boat and stuff like this
15. Once everything is done take your 6 Irons and go to map 5
Estimated: 45min

Map 5:
1. Jump in the water collect one Iron and end the game.

Whole game estimated: 90min
The parts where you have to gather ressources and stuff are similliar to unskipable cutscenes in other games.
Apart from this, the game is quite ok for speedrunning. It has so much RNG in it, that it shouldnt matter.
But once you know, what you should do it is quite boring.

I think I have forgotten some parts but it should help you a lot. If you have any questions, feel free to ask.