Pretty good game. The only real fault is that it's too short!
The autorrs seem to possess a very confident sense of style and the technical and aesthetic know-how to make it work.
The graphics are very vivid and very retro. It includes all the best elements of classic high-fantasy. The soundtrack goes perfectly along and, when playing, you can easily forget or ignore that it's just a loop.
The gameplay is more or less what you'd expect from a classic side-scrolling shooter. Some more enemy variation as well as more and slower character customization/progression would be great!
All in all, I'd give this 4/5 stars for what it is. It is short, but it certainly accomplishes its goal, technically speaking. I would love to see the concept expanded into a full, proper game with non-random maps(or some very clever procedural generation) and increasing difficulty and variation--and perhaps even a story to match the aesthetics! It has potential to develop into a GREAT game of its genre.