This is really cool and promising stuff 
I love all the projects popping up showing how UE4 is surprisingly good for procedural generation. Instanced static meshes really are a godsend.
How do you plan the gameplay to be? Will you be chased by a minotaur? Will it be filled with deadly traps and riddles like in The Cube?
The maze looks really cool from above, so you should consider dropping the player in from above so they get a quick look before they start.
Looking forward to seeing this evolve!