This level is pretty good for starters, but there are still flaws that you could consider improving/fixing.
Thing placement is one thing you could consider fixing, a example is most of the rings at the beginning are not collectible unless you switch to tails, as there are no attraction shields in this stage.
Platforming is quite a challenge in this stage, but too much just gets boring and makes the player want to quit after awhile knowing that all they will be doing is platforming, you may want to consider adding a few more gimmicks and hazards to the stage.
Finally, the level looks empty, it just feels like I'm running through a hall of nothing, you could add some decoration (bushes, flowers, etc) to the stage to add more detail, maybe even add some little details on some of the sectors. It may seem pointless, but little details can sometimes change the final outcome ALOT.
I hope these tips help you in your future maps.