Current questions and answers regarding the map editor.

Thank you)
I have a few more questions: 1 - I couldn't insert custom music into the map (in .ogg format), and 2 - how do I create a pit in a dungeon? 3 - I haven't figured out how regions work... and am I bothering you too much?

1) Music should be placed in a separate folder, so there's no need to embed it in the map. Ask your birthday person to put the music in the "music" folder.
2) Place some static object (preferably for underground use), in the properties tree, in the "Shared" line, click on "..." and in the directory tree that appears, look for something like "Dark Dawn" or "abyss". I can't give you the exact link right now.
3) Were you able to rename the region?

Added 30 seconds ago
How much time is left until the big day?