I've worked on a custom map with a few friends and we really like how it looks and the things you have to do. So we decided to upload the map.
We did'nt use Tilegen
We are constantly adding things to the map so this is not the final release. So if you want to keep checking back.
Credits: Hey Apple
Tri. Pekka Mela
NakashimaKun
http://forums.steampowered.com/forums/showthread.php?t=1380124