1. Crashing bug caused by the player's actual location and where the game thinks the player is located getting out of sync.
2. Crashing bug when attempting to undo pushing a movable object (mirror, box, anti-tank) into a tunnel.
3. Priority bug with tunnel destinations caused by swapped x & y coordinates.
4. Laser bug caused by not clearing dead lasers from the game board when they hit objects that may reflect them, depending on which direction they are facing (rotary mirrors and mirrors).
These fixes will become part of the next build update.