It is fun . . . what's it built with. More maps, leader board, start a signup system so users log in to keep points/score, username etc. Invite friends to play

It is fun . . . what's it built with. More maps, leader board, start a signup system so users log in to keep points/score, username etc. Invite friends to play on a map together. Add signups to an email list drip.co. Good luck, it's fun to play so I'll keep checking it out.