Others have pointed it out, but I will make it clear. Contests like this require you to build upon a pre built terrain. Download the map and copy your build into it. Otherwise your nice build will be disqualified. Also displaying your project with texturepacks is also against the rule, however using shaders is fine. So switch to default texturepack for screenshots. I hope that helped. Find the pre made map at the contest rules.

- texturepack
- starter map

but you have enough time to fix that

Did you use the startermap?
Otherwise this will be deleted.

I wish you could use default texture pack for your pictures. Read the rule.

Beside that, nice idea! Keep on