How much RAM where you using at the time of the tower? 
Ergh, I didn't check. But all the windows were at Best settings with forced high draw distance with 8,000 bricks in the map, and 8x anti aliasing. Looking back I guess I didn't optimize it quite as much as I could have. :P
I lowered the resolution to 720x480.
And I was recording one of the windows. Speaking of which I'm uploading the video of it.
FU--
Nevermind. I didn't save the file, published, closed it and realized I left 14 minutes of blank space due to a brain malfunction during editing. So ask me if you
really want to see it and I may or may not decide it's worth it but not right now because I'm tired and stupid feeling.