Specific:
  * Make arrow keys work in rect_drawer
  * Make number keys work in game
  * Full screen mode

Cleanups:
  * Clean-up finding and loading of speech strings.
  * Fix thing.enter being called multiple times without leaving

Hints:
  * Interacts with broken pipes & cryo/pipe / tins
  * Interacts with laser cutter & tins
  * Interacts with cameras
  * Interacts with cryo-resevoirs & empty bottle