Two bugs I noticed here.
1: You have a lot of areas set to play an ambi track 23, yet no such file exists in the level itself, did you put this track in the Data folder instead of your level's own internal folder?
2: The wall meant to block Juni's path at x1013y997 is incomplete, and leads to a void.
Other than that, I didn't notice anything severe. The level itself is interesting, though a bit dull to play. For the next one, I might suggest you make a more interactive landscape, if you know what I mean.
Still, not bad for a first attempt. Have a star.