Added a whole bunch of different tiles yesterday after I was too tired to code anything. So now there will be a variety of decorations and machines to make the levels look more interesting. But while testing I also discovered that on one of my laptops the game graphics break badly... I know why, but I have no idea how to fix it. For whatever reason Chrome on that machine is doing pixel sampling differently using interpolation. So if you test and the graphics look dark and distorted, I'm sorry, I probably won't have time to fix that within the 7DRL.
Regardless, here's how it should look.
I used a subtle colour palette since the droid you're controlling technically can't see colours, so in the image they're standing in for the different ways the surfaces reflect your LIDAR back, giving your droid some idea of the surface features. A few items are coloured more strongly, because they will be functional elements. Doors also open and close, which is cool. (Constantly for now for the test.)
You can see the test for the tiles at http://refractivegames.com/7drl-tiles/
Next up, level generation.