Pretty good overall, but is there any way to change the default key configurations? Placing action and cancel so far apart is less than ideal. RPG Maker uses Z and X, which is really nice on a QWERTY keyboard. It would also be nice to get an explicit message when you hit a weakpoint or resistance like RPG Maker VX does, if that's possible.
I can't seem to find Dusto's ultimate skill, unless he doesn't have one? The only sidequest I have left is the superboss, which I can't figure out how to beat. I also seem to be missing one of Robox's status skills, the one immediately below Corrode. (I may also be missing other skills of his, unless not all of them complete a line.)