Maybe you know the unicorn skip in level 2, which allows you to skip the first fight. While practicing this skip, sometimes, the unicorn gave me enough vertical velocity, to allow to "fly" above the level, and skip a big part of the level!

There is a lot of potential of this OOB, but for now, there is no consistent way to do it, and it seems to happen very rarely and randomly. So it can only happen if you are lucky, unless we find a way to do it consistently.

Here is a video to explain the current discoveries about this skip:

Potential skip for the last fight in level 4 before you enter the boss fight:

You gain considerably more speed by strafing:

You can glitch unicorns through walls:

I found an Out of Bounds in level 3 but it seems to be useless.

Here is the current fastest way to complete level 2. Read the description of the video for more informations. However, keep in mind this happens randomly, so even if it's good to know this method, you'll probably use it extremely rarely during runs ^^'

You can skip the forced stop in the tutorial but I have no idea how. Here are two occasions I got it accidentally:

Guide Fairy Skip #1

Guide Fairy Skip #2

EDIT: Guide Fairy Skip is consistent now:

I was able to skip the second fight of level 1 somehow!! We need to study it, because it can become a nice time save if we can replicate it consistently.