Great game!
Warning:Minor spoilers ahead
It's a great game but you could have made it explained what each stats do and that you should import your data from the story mode to the arena mode if you wish to play on the same character. I've also had the annoying white square following me everywhere and suffered some heavy frame loss after about 2 hours of gameplay. The shamen class was a tad bit underpowered (especially against the final boss) while the scout was a bit overpowered. Also, I've found the 5 gold achievement MUCH MORE difficult to get than you give credit for.
Other than this though, this is one of the best, if not the best flash rpg's I've ever played! I've gained all the achievements, reached the level cap and can't wait for the sequel :)
-Spoiler-
P.S. I like the Hypno-Toad reference :D