Search for the Default Minigame Script, and say /setdefaultminigame when in the minigame.
as for the doors, use wrench events.
How, specifically, do you want the bricks to fall apart? Would random bricks die every 10-30 seconds? would they start breaking after you've moved past them?
To force them to work quickly, I would say have the bricks die from the start to the end like so
start|1|2|3|4|5|end
some time later
|||||||||2|3|4|5|end
some time later
|||||||||||3|4|5|end
some time later
|||||||||||||4|5|end
If you build each section focused on one brick(so if that brick died the entire section would go too) I could rig up a script for you that would cause the central brick to break after a certain amount of time.
Another thing you could do is have the players trying to get higher up in the station and have lava/acid flooding the station as they progress(would be done by making a waterblock that is liquid type lava, and using my or jookia's flood script to make it flood).
As for gameplay, I would say make the players crawl through air ducts, solve puzzles, avoid turrets & other traps, and escape quickly. Again, you can use wrench events for puzzles, turrets and traps. Another thing you could do is make it so that the players have to find a gun and shoot a trigger across a gap to make a bridge appear.
