Update 7 is here and it includes a [b]Speedrun Mode[/b]!
You can toggle it on or off by hitting the [b]F1[/b] key at any point in the game.
[img]http://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/27740404/4196cb00116c8cc3807c23498031820f3f1affde.png[/img]
It's pretty lightweight. All it does is drops a clock on the top left hand corner of the screen that tracks your run time and shows your stats.
It also enables a few hotkeys. You can use [b]Tab[/b] or [b]Shift+Tab[/b] to scroll between levels and [b]hold the Restart key[/b] to restart your run from the beginning.
My record is 2:06.
But that's only because I can't type the cheats to skip levels any faster.
I think I can manage a minute fifty if I put some more effort into it.
Cheers