Thanks! I wanted to create lots of special elements that would allow jumping between layers, so there would be a couple of explicit stairways and then a lot of greebles and props that could be jumped on. Part of the fun of the game would have been from learning which props could be jumped on and spotting them both in edit mode and challenge mode and using them to set or get the coffin.
I ultimately only managed to do interesting features for diagonal tiles before realising how long that would take me. Here's a map that covers the whole height using the tiles I managed to make in the 7 days: https://www.carbidefunction.co.uk/while-vampires-sleep?map=P0IAviMAfKcE+M4R8iEEA...