More tiles and more gold!

This week I worked on one more tile type - iron plate. This tile will reward you with 3 gold on entering without any modifiers but it can't be used as base to build further.

Entering build mode now highlights places you can expand your maze.

Also added some pickups - gold bags for quick boost to collected points and keycards.

Keycards are special pickup to open doors keeping you away from grabing big prizes. Diferent color doors need diferent cards. Look around the map to see where they are placed.