there are rules but there intentionally obscured. 

There is a symbol bottom left corner that displays one vs two handed.. but I'll try to make it more honest. Thanks for playing and thanks for the feedback! 

Thank you Buttons!

Hey Ben, Glad you got it working. Sorry I thought I had validation on the password box. I'll get it in. 
unfortunately the otherwise helpful tool I'm using for leaderboard and character creation doesn't give me a useable feedback to pass to the user, so i'm having to guess and what's gone wrong.

thanks for your persistence, I hope you have fun with the game!

I can't see your account name registered. The email address has to have a normal format (i.e. xyz@something.com) and the password has to be a certain length. If you're still running into trouble and you're interested in trying to make sure you can register please reach out again and I'll fault find. Otherwise you can play the game without signing in. (it's just to capture leaderboard names for now).

Unfortunately the registration is not related to itch.io it's platform independent. (i.e. you'll have to register with the game, separate to the purchase of the game of itch.io)
I'll see if I can make that a bit clearer in game.