Renamed files: constanten→constants, adt-positie→adt-position,
adt-doolhof→adt-maze, adt-sleutel→adt-key, adt-tijdslimiet→adt-timer,
adt-teken→adt-draw, adt-spel→adt-game. All message names, variables,
comments, and tests converted to English.
Also fixed counter location bug (time-label x/y were swapped).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Combines game-logic, keyboard-handler, main-loop, and pause-menu into
single level ADT. Handles movement, collision, teleportation, coin/key
pickup, door opening, pause toggling, and time updates. No graphics.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
