not easy to use?
lol... I guess it might not be.
I have gamemaker and am currently creating a sample "engine" for my own planned Chrono game. I still have a lot of work to do (I think gamemaker was created with more arcade style games in mind) but I'm making progress.
I recommend reading the instruction (the help file) thoroughly if you are really interested in using it.
A little programming experience doesn't hurt either