Very clever way of havi(ng people beat a platformer! Really makes you think how many more cool mechanics there could be if you continue with this.
Agree that the music was a repetitive (have to admit that I muted it after awhile). I'd also make the block placing mechanic a bit more visually clear (i.e. sometimes if I accidentally double-clicked on one of the blocks up top it would place them right on the spot and I had to figure out that it was placed ON the bar). But that is a minor detail.
Great puzzle design!