I love the game of Dungeon Master and Legend of Grimrock. I'm thinking that I'll do a little dungeon for Frontiers, which will solve spatial puzzles, as in these games. This to work, you need to calculate:
Stone on the platform - yes "1" = door closed, not "0" = door open
Counter for multiple objects. Two keys to open one set of doors.
Counter "2" = door closed
After inserting the first key, the counter decreases to "1" = door closed
After inserting the second key, the counter decreases to "0" = door open.
Furthermore, teleportation Nebula for the objects and players. Stone thrown through the gap in the nebula moves to another position and will continue the flight, as the platform that opens the door.
What do you think Lars? Will that do?