I think the original Final Fantasy characters may have been more like this if their names had not been so limited in number of characters xD.
Anyway, fun little game! I like the music and the sound effects that were added. I thought it was neat that when zoomed out, you could see the entire level, although it did turn the characters into wee lil' bits. I think that could be used as a strategy element too, like if a path were not reversible, but you chose based on what you saw when zoomed out.
Other than that, I would say it could just use a slliiiiiight tweak on the battle balance...I think maybe increasing the cooldowns just a little. I see the idea there of using your heal at the right time, but I started to get the feeling that even if I didn't strategize that, and just used it when available, I wouldn't be able to lose. Mind you I didn't actually test it enough to be sure.
Also nice job on the lighting and shadows! Definitely adds a lot to the environment.