That was really cool!!
I have to say, and I've seen that you have recognised this in other review, that the animation it's the episode's weakest point, and I would probably also say that the character designs could use some work. There are some moments that are very well done, considering all.
Regardless of that, I found it really engaging and fun to watch. Like others said, music, voices and script are all great, and I think the animation is good enough to not bring it down.
I wouldn't do the next episodes too much longer than what it is already without improving animation or design on some way, as it could make it tedious. Is much better to have an audience committed to shorter episodes than losing their attention with longer ones.
Also is a good idea to shorten the intro in the next episodes. Tales of Alethrion has a really long intro and I founded it very annoying.
In all, there are professional products that are not as entertaining as this is, so you are doing great!