Thanks for the suggestions! I think I can get these changes in before the release date (this Thursday, 2/28).
1. Good point, and this is an issue I can quickly resolve. When I get home from work today I will change the sound effect.
2. It's not strictly necessary, no, and the difficulty of the change really depends on several factors. Just to be clear, would you prefer that the game automatically transition from one scene to the other without the prompt appearing and asking for the player to press y/n?
I have the menu prompt right now for two reasons, (A) it will stop the player from accidentally leaving a location, and (B) it displays the name of the location. If A is not an issue, then I can try resolving B by having the name of the location appear and then fade away when Theseus arrives somewhere new. For example, if he goes to the Sanctuary of Asklepios for the first time, I could make it display the title "Sanctuary of Asklepios" for a few seconds at the top of the screen.
I might just include this in a post-release patch, though; I need to test it and see if it makes for a smoother experience and whether I can make the titles look good and seem unobtrusive.
3. Yes, here's a little secret: those green blobs are one of the few remaining bits of "art" that I made myself. I thought they looked okay so I left them, but I'll try replacing them with something else. If I can't find anything suitable, I'll commission something new and include it in a post-release patch once the artist has time to draw it. I'm pretty confident that I have something appropriate already, though.
On a side note, Ultimate 7 is also one of my favourite RPGs of all time. I would like to mention a very similar RPG: Teudogar and the Alliance with Rome. Imagine an improved Ultima 7 engine with turn based combat, and it's set on the marches of the Roman Empire during the time of Augustus. the game is no longer available for download as far as I can tell, but people are still discussing it on sites like rpgcodex.net. I myself offered to host it on my Steam store if the developer would like; it's a really, really great game for anyone who enjoyed Ultima 7.