Here are some things that bothered me or I think could be improved:
- The movement is pretty slow. I got accustomed to it took me a while
- The sword just didn't work. I couldn't kill a single skeleton and ended up just running to the exit
- the text was very difficult to read in the browser version
I liked the idea overall, even if I couldn't use my sword it was fun zig-zagging around skeletons :D