itch.io

I don't have a guide or anything like that unfortunately.

I do have a video where i make a level for the game though that might be helpful:

In addition here are some keys you may find useful:

1. Left click to select stuff

2. Right click + drag to look around.

3. WASDQE moves the camera

4. Numpad 9 (Page Up) raises the selected object continuously

5. Numpad 3 (Page Down) lowers the selected object continuously

6. Numpad 7 (Home) places the selected object to ceiling

7. Numpad 1 (End) places the selected object to floor

8. Numpad 4/6/8/2 moves the selected object in the X/Z plane (this is done relative to the world not to the camera)

9. R raises the selected object by 50cm (or 25cm if Shift is down)

10. F lowers the selected object by 50cm (or 25cm if Shift is down)

11. Del deletes the selected object

12. T sets the texture for the grid cell element (ceiling, upper wall, lower wall, floor) under the mouse cursor to the selected texture

13. Ctrl+T selects the texture the grid element under the cursor uses

14. G rotates the texture the grid element under the cursor uses

15. Shift+G flips the texture the grid element under the cursor uses

16. Clicking on the floor/wall/ceiling/etc selects a grid cell.

17. Click+C copies the settings (texture, heights, etc) from the previously selected grid cell.

18. Alt+Click in play mode with the free camera mode teleports Petra to the clicked point.