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It was easy, but it was quite entertaining. Pistols + Power = Win. I think you should shuffle the songs throughout the gameplay instead of having to start the song over again for each stage.
Somehow I was able to defeat Team Maskedmen without actually killing them (didn't get the medals, but got their equipment.) I just refreshed the page to do it, dunno if you can reproduce the effect though.
I also found that if you refresh the page, you are able to activate the barrier on the first move, but this is only for the first fight you enter.
I also noticed that both death options just lead you back to the stage select.
Overall, this game was entertaining, but riddled with bugs. I'd like a sequel, but with fewer bugs. Good luck on your future works.