Cool
Nice song man. Seems to be more Dance than Ambient though I think, but genre doesn't really matter. I think you were right not to add much, if any reeverb to the percussion. For one thing it adds more depth to the sound, but also makes it more prominent and focused. Theres a couple of build ups at the end which don't really seem to work. They're kinda like anti-climaxes which is a shame. Great use of percussion. The variety goes really well. Nothing seems to odd not to be there, but very varied. The riff is ok and it sounds well EQd and stuff. Nice job :)