You can skip it by clicking the Tutorial button in the game interface, which turns into Skip tutorial after you open it. Plane Crazy’s tutorial is optional, and the wiki notes that it can be closed or skipped from that button.

Quick steps

  1. Join Plane Crazy.
  2. Look for the yellow Tutorial button in the interface.
  3. Click it once.
  4. Click Skip tutorial to bypass the tutorial.

Small note

If you already started the tutorial, the same button becomes the skip option after it is opened. A beginner guide video also mentions that players often finish or move past the tutorial before getting into normal building and flying.

TL;DR

The tutorial in Plane Crazy is optional, and you skip it through the yellow tutorial button in the game UI.