I am preparing a holiday gift kit for my nibling centered around this game. It will include a printed and hand-bound copy of the game, a small Yixing teapot, several different teacups in different styles (some mended with kintsugi), and an assortment of different tea ingredients (black, green, and oolong teas, peppermint, rosehips, ginger, etc.), and a nice journal and pen. I plan to provide suggestions for substituting the real-world ingredients for the ones in the game, and maybe suggestions about selection of the right teacups. My nibling already shares my love of tea and I think this will be a hit! I'll send a photo once I have the kit assembled and I'll let you know what they think of it after the holiday.
39 days ago(+2)
Here’s the completed kit. It was very well received! My local herb shop might be interested in selling these kits with the game, or just reselling the printed game. Do you have a resale policy? 
39 days ago(+1)
Oh wow! These are incredible. Is there a way I can get in touch with you? My bluesky is https://bsky.app/profile/springvillager.bsky.social
I am finishing up an update to Last Tea Shop, which I'll publish in a few days. Revisions to the cover, backpage, layout and text—mostly clarifications and typos.
34 days ago(+1)
Here's my ingredient substitution list, if anyone is interested. I was leaning toward ingredients I like in tea, rather than trying to match the visual characteristics of the original ingredients. Some of the original ingredients are available as medicinal herbs, sometimes with cautions about use. Others, like Birds Nest Fungi, aren't used in tea as far as I can tell, and are non-toxic, but I thought it would be more interesting to substitute something tasty. The labels on the bottles have the ingredient name in quotes if it's a substitution, and I wrote the actual ingredient name on the bottom of each bottle.
Original List | Equivalents |
Dried Sage | Sage |
Chamomile | Chamomile |
Quartz Crystal | Quartz |
Ancient Seashells | Seashell |
Sea Salt | Himalayan Pink Salt |
Bright Gumdrop | Crystalized Ginger Cubes (drop of red food color) |
Kawakawa Leaf | Keemun (black tea) |
Gingko Leaf | Hojicha (green tea) |
reindeer lichen | Sencha (green tea) |
Feather Moss | Peppermint |
Giant Puffball | Lemon Rind |
Bird Nest Fungi | Rooibos |
Cloud Dew | Butterfly Peaflower |
Mountain Daisy | Linden Flowers |
Snowdrop Petals | Jasmine Blossoms |
Beard Lichen | Rose Hips |
Star Grass | Star Anise |
Shaggy Moss | Cinnamon Stick |
Other ingredients that I considered, but didn't use in this set included granulated honey, cornflower petals, cardamom pods (often used in chai masala), lemon balm, vanilla bean, cloves, and fennel seed. I could also have included more different kinds of tea (unflavored leaves from Camellia sinensis), e.g. oolong, Darjeeling, white tea, etc. Some ingredients are usually combined with other ingredients, e.g. several spices with black tea to make chai masala, rather than being served alone, but I think all of these ingredients could work alone as a drinkable tea.