First impression: This is quite an OOB submission!
Composition and technicals: The technicals (from what I can see after all the editing) are fine; the composition is centered but works for me here. The angle at which it was shot links the image to the challenge topic and is quite fun.
Final thoughts: The image is very over processed for my taste, it is definitely belongs more in the realm of digital art. While intentional, processing does not work for me. This is fun shot but is too out of the box for me (it feels more like a shoehorn, really).
I'm sure you are getting totally nailed in voting in this. I'm sorry, I've been pretty open on my definition of a tunnel for this challenge, but I just can't fit this into my concept.
not sure if you were going for it but it's a 1 from me. if you were, congrats, if not, sorry, but it's just too overprocessed that it doesnt even resemble a picture anymore