A side project to the side-project? Naturally. I paused my first playthrough of Teddy's Haven to start a "jams only" challenge and uh... there is jam. There is so much jam. From the humble beginnings of a single shelf to "omg we have framerate issues" aka roughly around when the third pic above was taken. I'm not sure if it was too many of the same types of jams stocked on too many shelves, or the black wall paint (not even kidding as a swap to pale green seemed to help) but it was at that point we invested in a restocking wisp and reduced the amount of jam on the shelves.
It's now autumn, and how are we looking? Like so:
I think I'm at about maximum necessary jam pots to keep this thing running, especially as once each season's jam is well back-stocked it's kinda overkill. I have the jam shelves organized by season into spring, summer, and fall, and assuming winter isn't dead then there will be a winter shelf as well. The smaller shelf on the right is all-seasons; technically azureberry is a spring berry but it stays in specific nodes during every other season I've witness thus far. Plus, the apple jam needs company.
The "jam only" rules I made up in case anyone wants a run at it, and mind you this is being posted during early access so it might need tweaked for future updates:
Day 1: you can sell berries and apples in the produce shelf that the tutorial provides. You must earn enough to buy a jam pot at the end of the day, and buy a jam pot. Fill said jam pot with berries.
Day 2: you are now selling jam. Only jam. Always.
Rename your store by or on Day 5. Plan accordingly for the cost.
Don't tend harvestable animals or mine any mining/crystal nodes on purpose. Products received through accidental clicks must be trashed.
You can pet Teddy and cats. You can interact with NPCs.
A couple of tips for this... firstly, don't buy the produce license as at least in this version all the buyables are veggies (and they don't jam). A good starting berry is azureberry, or emberberry if you want to hoof it out that far on the first day. Unless winter has a better berry, emberberry jam seems to be the most expensive seller. Market rate seems to work just fine too, for any jam type.
Update: results one in-game year later.