A wooden stairs to have a visual way to symbolise a way out of the current level.

With the Openlock triplex base you can click the tiles together in a limitless configuration of your choice.

I added aditional beams on the bottom, because I found that printing some tiles without them gives a very bad texture at the bottom. And if I put the time and money in tiles, I want them to be pretty and sturdy.
 

Instructions for the openforge/openlock system:

• Print the tiles of your choice.
• Remove the small supporting pins on the sides.
• Print Openlock clips to connect the tiles.
• Push one or more Openlock clips into the tiles (depending on the size of the tile 1 can be enough, 2 works best with big tiles).
• Connect the tiles together.

The designer of the totally free, awesome and VERY complete series is Devon Jones, check out his profile => https://www.thingiverse.com/devonjones/designs