Yeah, I have some knowledge of command blocks.
With the next stage I build (which will probably be a Sky Corridor of some type) I will see if I can build a collapsing bridge.
Essentially, it'd be like this:
-Build the bridge.
-Section off parts of the bridge that'll collapse.
-Save those areas with craftbook (which can toggle cuboid states).
-Build the 'collapsed' version of the same bridge.
-Section off those parts as the off-state of the bridge.
-put a commandblock that's based on how distance from the player, probably halfway through the bridge or something, in a small turret.
The idea would be, as the player passes the 'detection zone' of the command block, he'll trigger the block, which will start to, one by one, 'toggle' the areas behind the player. It would have to be hooked up to a redstone timer (using repeaters) to, in a few 'ticks' start collapsing the next section, and so on, and so on...
Once the player successfully crosses the bridge, as he enters the door to exit, the door would trigger another commandblock which would 'reset' the bridge back to its off state.
Should the player fail to cross the bridge, he would fall, either to his death (!) or to an alternate pathway that leads somewhere else in the castle.
Right now though the map is set up somewhat in between a SotN and a CV64 style, because you have save rooms, but no warp rooms yet. I imagine eventually I will build warp rooms so one can go to different stages, etc.
Also, here are links to two Minecraft skins I made:
Simon Belmont - Super Castlevania IVGabriel Belmont - Castlevania: Lords of Shadow