It's a very interesting level.
I would say the primary issue here is the concept is a little unrefined. As a new level builder I think a smaller version of this type of level with a more refined and tested path would make for a more enjoyable experience.
However, as a first level I thought it was pretty cool and I'd like to see more from you!
Not bad actually as a test of skill. Nicely combines a test of manipulation with an ending test of pipelining. Optimizing was way easier than expected.