Pretty cool concept, i like the initial character customization zwhere you can drag and drop attributes for yourself and the ennemies, spritework is pretty neat as well, especially the smooth animation(the flying books in particular).
Didn't have any particular issues with this one, if i had to nitpick a bit though i'd say if you have an 8 way movement, have the shot be 8 way as well and not just 4, but really like i said more of a nitpick cause the full separate control of movement and aim is really good anyway.
Nice job to you guys :)