Ok so lets pretend you're a demolitions expert, and your boss says, demolish this bunker type thing to access the diamond at the bottom.
So here we go.
1. Pick a bunker simulation, you can use any one's bunker as long as you give them credit and what not.
2. place a diamond at the bottom or the shaft that is the farthest away from your start. The place where you start must be the entrance to the bunker as obviously seen here
As you can see, I took this person's bunker (the creators name escapes me right now) This is just my personalized version of this person's bunker, I extended the tunnel entrance, added a river and a dam, flattened the mountain and what not.
So I started at the tunnels entrance under the waterfall.
I started in the tunnel using explosives such as C4 and NITR, I used Rubidium as a fuse, try to make sure you sparked fuse or what ever doesn't channel to anywhere else except the explosives.
YOU ARE ALLOWED TO USE THERMITE AS A "DOOR BREAKER", but in controlled amounts because you may jeopardize the structure of the building.
You can only use the smallest size pen, you can only use the smallest size pen for eraser too.
you can only use the eraser for clean up, such as materials from the explosion, including cave ins.
You can only use the smallest size pen for plugging up holes such as leaks, such as water leaks or small holes, you cannot pause to plug up things, no matter how difficult you must have the simulation on the entire time
You cannot use the eraser for demolition, such as erasing things that have not been destroyed yet. If anything is floating by itself due to an explosion, you must erase it completely, no exceptions, you cannot however erase things that the author has drawn beforehand.
You must have an access large enough to get to the diamond you placed, if you bring down the ceiling or something, you must dig your way out using explosives and the smallest eraser for cleanup. YOU ARE NOT ALLOWED TO USE ANY OF THE CTRL, OR SHIFT BUTTONS FOR ANYTHING, INCLUDING FILLING. YOU ARE NOT ALLOWED TO USE THE REDO TOOL (CTRL+Z).
As seen here, I have successfully dug myself a hole into the bunker, I have erased any garbage and stuff that was in my way, And I used explosives to get to the diamond I place, well once I have the diamond, you can erase it, because you have it now.
I did have a big problem with all those cave ins, and what happened was the explosives made a big cave in that caused a big hole and water was escaping, the rock was hot enough to turn that water into steam and it plugged it self for the time being, I plugged it with water, and removed the steam as it congested up again. The Thermite I used caused a big lava pool, I used LN2 to cool it, so I could erase the broken metal at the bottom.
NO SPECIALS ARE ALLOWED AT ALL.
Now if you thought you had fun doing that, then do this.
Level the rest of your bunker using explosives to bring down the rest of the structure, this will probably cave in a bunch of what ever was on top of your bunker.
Then build a city over it, starting with small buildings, use only the smallest pen size. As of right now I am between the stage of leveling the rest of my bunker and building a city.