Not terribly complex, but does well with what it has. The combo system is quite fun - I only really started figuring it out a good bit through my playthrough. The art is nice and just the right amount of strange. The only critique I have is that it could really use some navigation mechanic. It's pretty hard to keep track of where you are amongst the identical passageways.
I recorded my playthrough, if you would like to watch it here it is: