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
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.