Looking at the screenshots, it seems the emeralds are on different layers. I recommend putting them on the BG's layer, so they don't conflict with player sprites.
Otherwise, I don't see much wrong with this stage. Congrats on the promotion.
this effect with layers of emeralds done this intentionally, this well placed to give an effect of intercropping and thus does not seem a simple photo stuck on the bottom.
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ATTENTION, STAGE UPDATE!!!
He put the introduction to the areas, as have the original Sonic games. After the screen VS and before starting the battle appear frameworks features of Sonic 3 & Knuckles above the beginning level. The atmosphere is great with these modifications. I hope you like
(http://img293.imageshack.us/img293/3092/sonicsky1pb6.png)
(http://img385.imageshack.us/img385/6418/sonicsky0kl1.png)
LINK: http://www.mediafire.com/?gnzzte9zgmn