Ambience
Kind of reminds me of the water levels from the first Donkey Kong Country but a little less creepy actually. Never got to play DKC2 though, always wanted to though. Was the game any good?
The synth plays a good beat and I like how it has a constant feeling of rising up too which makes it cool to hear to my ears anyways. The bass line has the similar effect too and sounds nice. Like the drums playing that simple beat they got.
The secondary sounds I hear provide a lot of ambient tone for this. It just makes it sound like you were exploring some area that had not been touched by anything in ages too. Really nice effect.
Overall, wonderful cover piece, sounds really nice.