jazzy? :O
win: I like the piano and the glitchy synths (?) which are on some piano notes. That trance-like lead is quite nice! The background synths also sound nice and I want to congratulate you for the overal result! It's a download for me!
"fail" (I wouldn't say fail :P but that's the way you asked me xD): Mastering... When the drums and bass drop in, everything sounds overcompressed. Maybe put the volume down of some instruments, or (re)equalize them, though then it won't sound the same... It's not jazzy :P.
Tips: maybe ad some more high-pitched hi-hats. Try to find a better piano sampler or better keyboard so that it sounds more real played. I wouldn't say this is live played (also because it's quantized(<--that's not bad though!)) Try sidechaining the trance synth with the bass drum if you want to xD
Overal: nice synths, nice piano, nice drums, bit poor compressed (mixing is OK ;)). The "fail" isn't really fail xD
5/5, 9/10, download
MW-Audio (Mjattie)