Your first map? If I'd guess I'd say something like tenth at least . Really great job, clever puzzles, especially I like that timing with cubes, I had to count seconds to finally do it xD.

I'm playing custom maps and record my first time of playing them. So the run is not perfect and may not use only intended ways, but maybe it can let you see how other people may understand the map or you could just enjoy someone playing this map for entertainment.
Anyways, here is the recording:

IWrtH541VHM
(Link: http://www.youtube.com/watch?v=IWrtH541VHM)

Also note the video description for more feedback and my signature for additional project information.

Nice map, enjoyed it. The last part had me stumped for some time.
4/5

Absolutely amazing job on a first map! Everything good that's been said before is true for me as well. It's rare to have a map that has multiple solutions, none of which break it! A very solid 5.
getting cube off top button
I just took the frankencube and jumped up under the laser.

I agree, this is an awesome job for a first map. The timing-based puzzles were tough for me because I'm so clumsy, but not so tight as to be impossible. Nice touches with the frankencube and singing turrets.

Solid 5/5 from me!

Alright, gave the map a little update after 2 years, fixing some stuff and making it Workshop compatible. Seemed appropriate after releasing my second map.