What engine created game series maniaplanet? What are its features, characteristics, the approximate number of lines of code?

Double tunnels can fit tightly clamped to the border, in contrast to the other blocks

Another bug - with the pipe.

http://i5.pixs.ru/thumbs/9/3/6/bugbmp_2821377_8373936.jpg Put a normal tunnel, and close to him + per block set up a double tunnel. We get an interesting picture: http://i5.pixs.ru/thumbs/0/2/9/bug2bmp_4772000_8374029.jpg The same bug, but with a different tunnel: http://i5.pixs.ru/thumbs/1/7/6/bug...

D01 http://i5.pixs.ru/thumbs/7/9/9/screenbmp_5049416_8367799.jpg D02 http://i5.pixs.ru/thumbs/8/4/2/screen2bmp_6379762_8367842.jpg http://i5.pixs.ru/thumbs/8/5/3/screen3bmp_7626807_8367853.jpg http://i5.pixs.ru/thumbs/8/7/2/screen4bmp_5372244_8367872.jpg http://i5.pixs.ru/thumbs/8/7/8/screen5bmp_209...

Hello, I have a question about steam workshop.
1.How to manage the tracks and sent to the workshop replays of the game?
2.How to remove your creations?
3.How to rename objects in the steam workshop?
Please forgive me for using Google translator!