Honestly, I have no idea what I am doing even after looking up the controls.
All I'll say is the game really needs a tutorial of some kind and some easing into the combat, maybe a practice fight against a near harmless slime. I can't even last more than 10 seconds against the first boss.
But either way its refreshing to see someone using rpg maker, if I recall these scripts look to be Moghunter's or of similar design.
Edit: I have come to realise that I should give your game a second chance and will likely do so tomorrow when I don't have a headache. However if there are any hints/tips you can provide that may improve my enjoyment of the game feel free to let me know.