I am sorry to say it, but I am starting to regret I've had chosen C2 instead of Unity or GM... Yes, I've earned more then the cost of C2 and learned important procedures, but I simply can't see it as a future option.
Everything is great (the software is easy to use, the community is great, the updates are fast and fix or bring new functionality) until you get to export your game and you are disappointed that a simple 2D game can't run smooth on anything (from smartphones to medium-high PC) no matter how much you optimize them, you can't get constant 60fps for a simple 2D game.
And instead of waiting for C3 or a miracle, i decided to start it all over with an engine that is already proven to make commercial games.
This doesn't mean that I will stop using C2. I will still use it, but only for prototyping or small projects.