This is an awesome prototype. Very short but very polished. The diaroma style and characters art are very cute. I felt like real-time combat was a bit confusing, perhaps for this type of interface, turn-based combat would be better. But other than that, it was great. Story-wise I think it would be more relatable if there was a better motive for Dunk to steal the sword. Maybe the castle is being raided and all the heroes are dealing with some powerful foes  but a small enemy, like a spider or something, gets past them and Dunk is forced to deal with it to protect his kitchen friends so he grabs the sword. A more noble reason than "Dunk saw it laying around so he flat-out stole it". Also the castle being raided would explain why the armory is left open - the guards and heroes went there to get weapons and because they were in a hurry the door was left open. But that's just a suggestion. I think this can become a great game. Congratulations, and I hope you keep on developing it into a full fledged adventure.