I really wanted to like this new version, but just couldn't get into it.
Pros:
1. Inventory system was a nice touch. Definitely needed for game.
2. Bringing materials to build armor was good too.
Cons:
1. Stairs just don't look right when they spawn. It looks kinda messy. Maybe if you could limit them spawning overlapping stairs.
2. The movement and talking system was downright annoying. I found myself constantly talking to some guy that I didn't want to.
3. Spawning system seemed odd and sometimes I just couldn't pick up items.
Too answer your questions:
1. There isn't really an actual game here. It is just a demo of different interesting platformer/RPG elements so it isn't fun!! It could be very fun, but it needs to actually be made into a game first (like one short level).
2. No. It has potential, but you need to actually make one full level before asking that question.
3. Too soon to say.
Based on what I have seen you have the game programming/building skills to make a sellable game. The "game" is just to rough to be asking the questions you are asking.