If this series is done correctly, and you as a flash artist improve as you add on, there can be a lot of potential for this series. But there need to be no typos, an improved battle system (not "way too systematic"), some character development and possible control of a party.
I like how you dipped into the Sonic: Battle sprites, definitely keep using those.
This particular piece I'll give 3 stars, but some tweaks and a few suggestions can go a long way.
Also, Laughingbox is right, you should be able to condense this flash to a fraction of that 13.9mb.
The beastly game Madness: Project Nexus is 10.7mb.