You don't have to use code at all - it is all event driven and some use of expressions (with drag and drop you can only arrange the graphics).
Stats, weapons and health are just variables you store
There is a lot you can do very easy. But there are other things that are more complicated.
So for this kind of game, you will have to learn/use arrays and maybe JSON.
Not to complicated, but also not the easiest things to do.
There is an alternative
http://www.rpgmakerweb.com/
this one does make live easier for your game, but on the other hand, if you want to make something else it's useless. Here C2 shines - you can build whatever you want.