I've completed porting the store code and inventory code, so all actions can be done in the stores now. I have attached a demo of the progress so far. It's an Atarimax 8Mb cart like usual, old style bank 127 and requires VBXE. Run it in Altirra with Warp Speed on as it is un-optimized still.

You can roll your character and then you will be presented with a choice 1 for Town, 2 for random dungeon. Pressing 1 will show you the generated town, and then will proceed to show you the inventories of all six stores. You can purchase, sell, equip and check your inventory from these screens. Pressing ESC goes to the next store. You can insult the storekeeper by giving him poor offers, and the next time around that store won't be accessible (you will notice it isn't displayed.) In the game, the message "the doors are locked" is displayed.

Pressing 2 will display a random dungeon and scroll the screen around showing you the entire level. Pressing any key exits the scroll and starts the demo over (your items that you bought or equipped in the store screens will be kept.) The store inventories are turned over, so you will notice new items in the stores.

PS. There are a few bugs in the code... you will notice some screen glitches after the random dungeon is generated. I'll track these down soon.