RPGmaker is a great starting tool for game making. Truth be told it was one of the first things I had, RPG Maker 1 back on the PS1. It was...a rather interesting tool to say the least.
But that said, RPG Maker is *EXTREMELY* limiting about the things you can do. Overworld puzzles/battling I find REALLY hard to get creative. I managed to do a bit with time travel/map change mechanics along with boulders, spikes, etc, but I really have to fight with the system to get a good overworld puzzle.