Maxim #1: All non-trivial software has bugs.

Maxim #2: You're far more likely to find bugs in your own work (especially if you're just starting out) than in some third-party tool or library.

Corollary to Maxim #2: if something you do doesn't work, you should examine your own work for errors rather than assuming that you've got a bug in your tools.

What I'm saying here is that your biggest fear should really be relatively down on your list of priorities. So long as you choose something that's well-regarded, ease of use, ease of development, flexibility to achieve the result you want, etc are far more important.

Nope, I'm not regarding to the language. I'm pretty versatile, i just need something solid enough to make my game run fine. I'm even ready to drop dollars in the engine if I need too.

My game is not that complex, it's pretty similar to Street fighter 3 third strike, with more animation. I think that should help you to answer my question ^^

Any good 2D engine should be appropriate for a fighting game; genre-specific features are something you can develop gradually and iteratively on your own. Therefore, to select a particularly suitable engine and ensure the project is feasible, experiment with the general-purpose features you are going to rely on, for example:

• How do you import, organize and edit sprites? You'll need an awful lot of them. (While you are at it, include your graphics editors and file organization in the evaluation.)
• How do you define and use collision silhouettes? You'll need to tweak them a lot, and every pixel counts.
• How do you author and preview animations? They are going to be at the top of the complexity scale, with state management, branching, timeouts, etc.
• How are collisions handled? You are going to process and prioritize a lot of different event types.

Since it is 2d, I'd say you should use GameMaker Studio. But, there may be a better alternative. You say you have created many smaller games. What did you use to create them? And do you not think maybe one of those would work for this game? The reason I say it is because no matter what you use, if you haven't used it before, it will require a learning curve, and you appear to have already used something else for games in the past and so you may be able to avoid this learning curve.