Thank you very much! Glad you liked it.
Regarding your questions:
- the option of cave or shrine doesn't affect anything story-wise. There are no alternate endings.
(If I remember correctly, cave first puts more golems in the shrine map, and shrine first puts more mages into the cave map.)
- T.O.P. is a circle, and I bought their products here. Unfortunately as of a few months ago I've heard that DL site hid a lot of stuff to appease credit card companies, so you may need a VPN to see/purchase some of T.O.P.'s work.
- Regarding the rest of the questions, if you've reached "Narrative Progress: Max" then that's the end of the story. Perhaps one day I may add more stuff, (I've kept some things open-ended in case I ever want to return to it) but at the moment it is unlikely.