There should be a leaderboard where you complete every level as fast as possible, timing ends when you complete the final level and timing starts when you enter the first.

i would be last place tbh

https://www.speedrun.com/micro_platformer/thread/l5x73 This thread contains some info regarding the possibility of that happening.

This will probably be added once the v0.7.0 update comes out, since it will make a lot of changes to the game and atm a full game leaderboard isn't really necessary.