Here i will try to list some nice tips and tricks that you can use in your runs.

Strafe walking: First up ,walking diagonal is faster ! By switching around the direction you avoid falling over.

Tyre boost : Simply release jump right when you first touch a tyre. It will give you the normal jump + the tyre jump. You may need a few trys before knowing when to release.

Example:

Crouch jump / crouch boost : You can get a big jump boost by releasing jump on the moment the player goes up after a crouch.

Example :

Crouch: By walking diagonal the player sometimes "crouches" . This can also be done in other ways as the physics are pretty random. You can start with a strong crouch on almost every level by instantly walking diagonal at the start of the level . It can be verry tricky to time it.

Billy's Explosions : There are many little billys waiting to blow up in many levels. You can use those explosions to get insane air speed and skip many parts of a level. You either shoot it when close or it detonates it self when you touch it.

Gun Recoil: You can use the recoil of the guns to get a bit more distance while in air. Timing is key tho , it could backfire and slow you down. Sometimes the jump rotation also makes it impossible to boost your self with recoil.

Boulder or other falling objects: By jumping at the right time or hitting an object in the right way you can get flung away or pushed . This is sometimes better or faster then just jumping.

Slowmotion clip: If you activate slowmotion right b4 an thinn obstacle you can clip said object. (This sometimes also happens without slowmotion but ist consistent with this method.)

Example : Btw u cant see the slowmode effect cause i had it on fast graphics.