How do you create a new mode? i wanted to make a key for 2 bombs... one bomb is at your base, the other at the enemies, the goal is to get the key, get it to bomb, turn bomb on.... and hope the enemy doesnt unplug it and ... u win!

Look in the FAQ and Asset Links threads. The FAQ thread explains how to add a mode, the Asset Links thread contains a link to the Mission Scripter.