I'm enjoying this game! I did run into quite a few bugs, but nothing gamestopping. Though for me the characters were mostly just purple blobs, so that was a let-down. Only Cthulhu actually rendered properly for me in the browser.
It's an interesting take on rock paper scissors. When I first grokked it I thought that it wouldn't be fun, but it's a compelling little mechanic, and I started to feel like certain enemies had patterns of choosing certain moves rather than being completely random. Am I right on that?