Games: Isoball 2

I was playing Isoball 2 last night. It's starts off very easy, but quickly becomes more tedious. One of the first things I noticed was that for some solutions you have to place pieces before they become obscured by other parts, and it isn't always obvious just what that placement should be, so there is a lot of trial and error until you figure out what those first pieces should be, based on the construction of the rest of the game.

Solution from Ayumilove Diary that does work.

Then I got to Level 29 where I got stuck. I finally gave up and looked up the solution, and when I found it, it was really annoying. It simply interchanged a couple of pieces in a way that should not have worked as well.

My Solution That Did Not Work

I should have know the game was bogus when I ran into the first problem: placing a bridge over a solid surface. I am pretty sure I tried this in one of the earlier levels and it wouldn't let me.