Watching the gameplay video I have to admit, the game looks boring. The giant battle had you just attack and dodge, attack and dodge. There was no real dynamic feel to the combat. There was no excitement to the swing and attack or fear from the attack of the monster.
I like what you are doing, and following the model of 2D side scrolling battles but it needs to be more dynamic that it is right now.
I think the Wonder Boy series is kinda an influence as well or should be.