Thanks Cybersurfer5000!
Even they say, that C2 is not very good for adventure games types, I still wanna give it a try.
My game is in HD720p and the posts all over this forum doesnt show any tutorials or specific steps.
So, I basically follow the platformer tutorial and figuring out, how it could work with adventure games, but it still need more specific answers. That's why I need some guidance.