v1.6.0 - the big level 12 fix

Version 1.6.0 is here! and this one hopefully fixes the level-generation bugs that have been haunting level 12 for so long.

Please test out the new version, and if you still run into the problem where levels are not completable because of walls blocking your movements or doors not being there or even monsters walking through/on-top of walls, then let me know!

IF you run into those problems, try to include a screenshot, and if it's on any other level then level 12, it's even more important to know that smile (right now I believe those issues are all limited to level 12 only)

happy shooting!