We are probably going to be adding single-level leaderboards a bit later, right now we are planning to do a different overhaul of the leaderboard so it looks better and after that we might add those (including the tutorial leaderboard, however that one will probably get too optimized too fast)

UPDATE: The tutorial category has been added in the "Level Leaderboard", check the leaderboard and especially the rules for it. Milliseconds on the timer are required and the time for submission is the time shown at one of the last frames on the in game timer when you leave the tutorial.

Check the rules in the tutorial category, it has a link to a guide explaining it.