Maybe it was the second to last level. To be honest, I don't remember which level it was exactly, other than it was near the end. It wasn't bad though! Just a little harder than the others. I really liked playing through the game!
I totally get wanting to make more levels. I wanted to make 15 levels for Dreams of Fire, but in the end I could only manage 10, and I really only managed tho have 10 because I worked like crazy the day before the dead line and the day of the dead line. Making levels is surprisingly hard, and making interesting levels is even harder!