The premise that I have to do is that this game is an hardcore platform, so the difficulty was designed with this view in mind.
First of all I really like the basic mechanics: the fall damage is good in my opinion because it gives you thefeeling of danger and therefore you have to be careful to make correct jumps. Lately in the game you also acquire the ability to lift and throw objects, this adds a nice puzzle factor.
Making a platform with RPG Maker is not a simple thing, on the contrary, it's incredible the work that was done behind.
Finally I really like the original music, they reminds me of the gameboy era. *_*
One thing that I didn't like is the size of the font. I would have preferred bigger.