Rebeka777 Well, "best" is a relative term 🙂 There are different ways to play and the goals can differ among players. And it is good to ask for advice or pointers from other players but in the end you will be best served by deciding what you want out of the game.
A quick set of responses to your bullet items:
- as I said in a reply to your other post, there are benefits to an event that may outweigh the demand on your warehouse.
- upgrade parts are a "scarce resource" so it would be good to use them sparingly. Choosing which ship to upgrade and when to do it is a matter of individual taste, I usually only upgrade a ship one or two levels if it helps me use less ships to complete a job, otherwise I let the parts accumulate.
- Saving both "regular keys" and "upgrade parts" as you get closer to advancing to the next region is a good strategy and many long term players follow that idea. Now there aren't many "long term players" for Port City yet but the game has many similarities to "TrainStation 2" where such a strategy is common.
Some players, myself included, would advise against trying to advance too quickly through the regions. With Port City there are only 3 regions available now with a promise of a 4th "coming soon" so there is a danger of running out of regions and then what? Of course if you do "hit the end" there are always events and if they are varied enough might hold some interest. With only 1 event so far we don't know how varied they will be but if TrainStation 2 can be used as a comparison they can be very different indeed (within the common theme of gathering materials, making stuff, shipping stuff 🙂 )
Lastly as you've noted about the demand on your warehouse, a good strategy is to concentrate on growing your population by upgrading the various buildings in your town. Population growth drives warehouse expansion which should make it easier to do jobs. But warehouse inventory management is an integral part of any game of this ilk so learning good strategies will serve you in the long run.
One thing to use is "factory upgrades" (which cost gems). Each extra production slot allows you to store some products in the factory instead of the warehouse. Early in the game I try to have 3 shelves in each factory and have 1 of each common item already made there. For the "smelting factory", copper is the only product in the early game so I have 3 sitting on the shelf at all times.
Well, that's all I can think of at the moment. Please let us know what strategies you've settled on or developed on your own so future readers can benefit from your experiences.