EDIT2:Note- The only reason this post is living is for those studying Nick's stlye of art(although, the info is very obvious)
I think the Spaz is fine, except something that bugs me, the eyes feel flipped compared to Nick Standler's art (I'll pull up an example) But I'm just being nit-picky, and I've just been studying his style of art alot recently.
EDIT- The best example I could think of is from this page in the JJ1 comic from Jazz in the first panel, and the turtle in the last:

Anyways, On the JJ2 cd case/box's front image for US editions, Spaz's 'eye line's face the same way, which is something to take note of(Despite the fact in most other images I could get(mainly from my copy of Prima's Strategy guide) his eye lines work the same way as Jazz and the Turtle from the comic image.