1. Stick It Up Wire Skip

This skips the first wire section of the level. By hitting the savepoint from the bottom, you will be respawned at the inside of the building.

2. Pier Pressure Savepoint Skip

The ship won't be running until you hit the second savepoint. With precise jump, you can skip the second savepoint and go directly to the ship.

3. Downtown Showdown Lever Skip

As you can see in the video, you can go to the roof of the building without getting the lever.

I'm just going to add to this one instead of making a whole new one.

Mechsquito 1 Skip You can skip the trigger that spawns the first set of mechsquitos with a precise jump. It only saves a few seconds and it is really tricky however so be careful.