I got 83 points, honestly I wanted there to be even more complexity levels (unless I just didn't score enough to unlock the next set). I think my success was based entirely on whether I was able to set up for gold blocks when they came or not.
It's really hard to use I blocks when you're stacked high and only have a few lines left. It's a combo of (1) the rotation from horizontal turning the block down instead of up and (2) the game canceling a rotation if there's no space, which combine to make it impossible to turn one of those from horizontal to vertical. Especially the 6x1, no chance.
That's killed a couple of games ;_;