Our entire journey with games started with Macromedia Flash. We have created our first game in year 2004 and so far we have created more than 100 games of that kind.
We heavily use flash to create online and offline games. Thanks to many already created game’s engines and ready solutions, we can produce a lot of games in considerable short time.
Adobe Flash is also great tool to create animations and design of the game. You should consider Flash especially when you wish your game to be played by users who use Internet browser on their PC.