Thank you for the kind words! Yes, the leaderboards are online, and were made using “Leaderboard Creator”, a.k.a a free tool of mine :]
The game does have a pause button, it is the Escape key, this is stated in the Controls table in the game’s page. Beware though, pausing the game will not allow you to unpause it due to a bug. We’ve fixed this and after the jam we plan to release a new update. Thank you for playing!