I have a suggestion for those who are trying to get a faster time in this game. (This could work for the other towers, too)
When you start the game, you could start and go until you die for the 1st time. Once you die for the 1st time, do the obstetrical that you failed on three times with out dying. And then do the next obstetrical three times, and keep doing that until you beat the game.
This will obviously be slower than any other run you've ever done, but when you practice, you can do it better when you are doing a for real run.
Don't be discouraged when you see times that are MUCH faster than you, because those people, had a hard time beating the game, too. The more you practice, the faster you'll get.