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I'm on a Mac. Flash refers to the engine – Adobe Flash Player.
So, I'm planning to rewrite the game using ActionScript.
As a result, the game will become cross-platform, won't require installation, and will even run on PDAs.
There are many more people who know ActionScript. Consequently, there will be more developments. And modifying elements in Flash is much easier.
As for the medium, it can be anything.
P.S. I really need soundtracks and voice acting. This is probably half the game.