Very good!
Addictive, but it could be made longer. You said it was a trailer, so make a full version here on NG. Also, you should try to get this to be the next massive online game, like World of Warcraft or something. That would be awesome, and would let people have a lot more freedom to explore the world of Sios. The best thing to do, at least for this, would be to add way more weapons, armor, and characters, plus a major story plot. Also, I have played your other Mobile Weapon game, and I think you should make a version of it that would let players use this battle style to fight, as I know some people have already suggested. All in all, here's my score:
Gameplay:10
Fighting:10
Upgrades:10
Map size:10
Story:8
Average:9.6, rounded to a perfect 10!
