First, let me state that I never visit the board--until now.

I'm looking for suggestions for a free online fantasy (or SF, but fantasy preferred) adventure-style game. It can be an RPG, but doesn't have to be. Text-based is also fine, but not preferable. I also prefer that it not be too simple, i.e., something that a young child could easily play. I also prefer not to have to download anything and connect to a client server to play, but that's not a dealbreaker. A dealbreaker would be one where I have to actively fight battles. I'd rather click a button that says "Attack." Another would be one where after a certain level, to continue advancing I have to purchase special items or "credits."

I've done a little searching of my own, but I haven't found anything yet that I want to stick with and/or satisfies my requirements.

I know I ask a lot, but if I don't ask, I might not find what I'm looking for. Any help will be appreciated.