I have a few suggestions for the game. English is not my native language so excuse me for spelling errors. Golden rule of shareware is that you should do everything you can to spread your game demo. There will always be people somewhere in the world who will like your game and gladly pay for it, but unaware of the game. Probably you are already aware of this , i wanted to remind you since it is very important, anyway..
Second, once the demo comes out, you will see that many people download it, but most of them just installs it, gives it a try for a few minutes, then uninstalls it without actually playing. With so many games around, this is inevitable. Small fraction will continue playing and then get addicted and finally decide to buy full version. What you should do is that pay special attention to the start of the game, the game has to be easy to play and funny at the start. Things may get complicated later on. Once I download a game demo and encounter with a frustrating interface, or a tutorial which will take an hour or so, I just uninstall it as many other people. Maybe it is a fun game but it is not starter-friendly and that is an important aspect. Ideal game should be easy to play and gets complicated over time (if it has to). Similarly, the storyline should be simple at first, more details maybe given later on or found by player himself in the game. When i install a game for the first time and launch it, i must admit that if multiple pages full of text open as introduction/story, i simply pass them without reading because i am more interested about the gameplay itself at that moment. After playing a while, if i like it, i go back and read the introduction to see what is the plot

Ok, maybe your target audience is only hardcore oldschool rpgers and not casual gamers. However this is your first project and of course you want it to be financially successful so that your company stays alive and you can make more and better games in the future.
I am looking forward for this game, good luck with it.