Honestly, what a cool concept. Gotta say, the art's got a charm to it. I put the game on fullscreen and had to click a few times outside of the game screen for the controls to start working, which was a bit odd. However, I like the different rules that are set out for each weapon, and I like the fact that we get different enemies showing up as we progress. It really makes you keep considering what direction to slash at, and which moments are truly the best to try to get an arrow in.
Also, are you the composer? Because if so, I really liked the background music. It's got a very nice melody. If you aren't, it was a very good pick.
I looked at your GDD and there were a lot of ideas there that you sadly couldn't implement, but sound like a lot of fun. It's honestly a bit disappointing that the game got DQ'd because the judge couldn't get it to work, but I hope that doesn't discourage you. It'd be cool to see you continue to make games, and maybe, at some point, you could take a swing at this project again! There were a lot of interesting ideas in that document and it'd be interesting to see it come to fruition. Genuinely cool game!