It wasn't bad, and was quite entertaining. However, it gets disturbingly loose as you get higher up, and the pieces will begin to move around, causing them to go.. "off-grid". I found this rather annoying as I got very high up, since my tower began to crumble, not because I wasn't good at object placement, but because the grid system messed around to much for me to be able to insert a piece without knocking a different piece over or having the physics of my piece turned on by going an invisible little bit over a different piece. This may be part of the programming, I don't know. If it is, it's certainly challenging, if it isn't, it could be fixed. Anyway, not a bad game.