Thanks to everyone who has responded so far.
Here are two more examples of what I have been experimenting with on RPG Maker:
These are from what I have named the Minotaur Gauntlet, a challenging maze-like layout that combines the look of Gauntlet boards with more D&D-like features, including cavern stalagmites and magical glyphs on the floor of certain rooms. Yeah, I'm weird, but the engine allows anyone to just make up whatever they want for the default tile sets...