Nero is great with tags, so I would personally wait for him give some CnC. From what I can see the lighting looks pretty nice but some areas are definitely over sharpened.
For a sprite tag it is pretty good, but I am sure you know my feeling about how much sprite tags are gay. Colors are great but the depth and flow could use A LOT of work. The zubat is fairly unrecognizable. Try taking the sprite out and work it into a cool abstract.