Love this game! Have you thought about putting it on newgrounds.com and implementing their scoreboard api? I think it would get a a lot of traction there, even without a scoreboard
Glad you like it! We haven't talked at all about putting it somewhere else, some people have suggested other portals too... Its very cool knowing newgrounds have their own leaderboard api, do you know if they force you to include ads in the game?
The site is completely ad free, you don't need to do anything to have access to scoreboards, but by being a monthly supporter your games can have more cloud save memory. Though the free-tier amount of memory is more than enough for a game like this.