It's a flash game i remember playing a week ago You control a little flying machine (which you can upgrade for money) with your mouse. On this machine you can attach different weapons. You must fight the other flying machine enemies and use gravity at your advantage. Also, at one point in the game you must choose between betraying your friends or not.
Listen, I tried to look for you, but so far I came up with zippo... Maybe answer some of these questions for me and I'll have a nother go at it, ok?
How was the background? Colour/scenery? How was the artwork drawn? bad/ok/very good? What do the flying machine look like? Shape/colour? What was the goal of the game?
And anything you can think of, how silly it may sound...
I was just looking for this game. There are two games of this style. One is Arcanorum, while the other is Da Vinci's Flying Robots. Based on your description of the story, you are looking for the former, while the latter is clearly a nearly identical ripoff.