Hi! Absolutely you're free to ask questions here!

Mosi doesn't have built-in "endings" per se. It's a bit more geared toward open-ended exploration. Of course, you can construct an ending yourself a number of ways. You could teleport the player to a room that's enclosed on all four sides when they collect the last item, and provide some dialog to indicate that it's the end of the game. Or if they need to speak to a character to deliver their items, you could have that character let the player know they've completed their quest but that they're free to wander around more if they wish.

Hope that helps give you some ideas!