Wow, that level is better than I expected. I disliked how you used the same textures and how all the platforms were mostly square or circular, but over-all it was a good level. The emerald secret location takes a little long to get to, I suggest removing the water from the path you take to get to it, and that farm looked nice, even though I couldn't get to it, which would've been fun to search, but the level was pretty good. Certainly not the best level ever, but it would've served a good first level had you actually continued with this SRB2 Project.
Also, the crumbling platform-hopping section near the end is a little too spaced out, I suggest using three instead of two crumbling platforms.