Shortly after posting, I stopped to think about all the games I'd played with parrots in them, and then reflected that almost all of those parrots ended up flying away in disgust--usually after the protagonist nearly killed them...

What do adventure game companies have against parrots, anyway?

So, first clue:

One of the first things you may notice in this game is that our heroine has no legs.

The next thing you may notice is that she doesn't need them.

How about a guess here "Rayman"????

OOPS! you said heroine , not hero sorry worng ghuess I think

Becky tries to think of a game featuring a mermaid.

Perhaps the protangonist is a fish, called Wanda. (Remeber the film?)

Barbie A Mermaid adventure??
EDIT: with the boost in memory help from Becky !!!

We're not even close yet.

Clue the Second:

This alien is searching for the Secret to Happiness...whatever that is...

This thread has reached 25 pages yet again (it's been going for a few years now!) and therefore I'm starting a new thread, where we can continue with the current game being hinted at here.