The first Level Editor tutorial is finally here. It will walk you through the basics of creating your first playable X-Morph: Defense map and publishing it to the Steam Workshop:
https://youtu.be/v2X-m7U4bs0
Topics covered in this tutorial include:
1 - Basic controls, keyboard shortcuts, camera movement,
2 - Player spawnpoint, core spawnpoint,
3 - Placing and positioning basic entities - enemy spawnpoints,
4 - Setting up the basic mission flow - intermission and enemy waves,
5 - Creating and adjusting a spline for air units,
6 - Publishing your level to SteamWorkshop.

We are planning to make additional tutorial videos that cover more advanced Level Design topics. Your feedback is very valuable to us and helps us to steer future development of the game. If you are interested in a specific X-Morph: Defense Level Editor topic that you would like us to cover, please let us know in the comments below.