Oh, this is a pretty cool idea. I love the art, the animations, the audio. Everything is just really cool. I ended up with the claymore and the earthquake thingy. Had tons of fun to be honest and the mechanic at the end typing stuff. Pretty cool. Would be cool if the code is stored in local storage for example and you can dig it up. Then maybe people who ran (for example my code is GVZ3BJ) get this displayed for them and they post it somewhere so we know when to check the run and what they ended up with. One thing though, I wasn't exactly sure how this fits the theme, but regardless. I did find one bug at the final boss, I run at it, touching it and swing with my claymore, doesn't land, but right after I dodge his attack, it lands fine. Just not before that, not sure why. Is this in the invincibility part?
Good work though. Hope you turn this into a full game :D