Ok . . .
Anyway, this level . . . well. I'll list them in the order that most people will notice them. First, you have a Hall of Mirrors in the level. You're level is way to larger and that's what causes it.
Next, after the begining, you have a really long area that leads to nothing.
The actual level itself is way to small. It was really tough to use the red springs you have the level. The water around it isn't very realistic, only damaging Sonic then letting sonic running on top of it back to land. Also, Sonic is actually forced to run across this water if he misses certain jumps.
It's nice to see you included a thok barrier, but there a small, inexcapable gap in between the thok barrier and the level.
Fix those and you have yourself a nice level, 5/10.