Ice, pull, doors, lighting, first real map

• ICE: Ice cubes can now be pushed. They don't decelerate until they hit something. If its an actor, they injure it with their current hp and destroy themselves. A formidable weapon!
  
• PULL: Objects can now be pulled from 2 squares away to 1. This is, of course, the opposite of PUSH. handy as an "undo" in the push puzzles.
  
• Doors can now be locked. Meaning they cannot be opened with USE. I use this in the test chamber to only allow you into the next room once the current puzzle has been solved.
  
• Test Chamber A is about 80% complete! this is  new map consisting of 5 push puzzle rooms and an observation room. This will basically acts as a tutorial.
  
• Played around with lighting a bit more. namely, the per-tile lighting. It works as well as I hoped! Even with one light, affecting blocks and actors, it is much better looking. Today's screenshot shows one yellow spotlight in a corridor. It is very light on FPS, as all of the calculations are done at design time, not run time.