Oh yeah, I forgot to tell you that when you go backwards, there will be no collision detection. You can try to find out how to get that to work, or just take out the option to go backwards, up to you. Or you can just leave it in as a failsafe in case you accidentally do go through a building when you weren't supposed to (but you shouldn't use it to cheat
).
Check out my best projects so far and please comment:
Tic-Tac-Toe 2.0 ................... http://www.alice.org/community/showthread.php?t=3548
Alice Paint ........................... http://www.alice.org/community/showthread.php?p=23408
Real-Time Clock .................. http://www.alice.org/community/showthread.php?p=12725
Maze Game ......................... http://www.alice.org/community/showthread.php?t=4301