I tested it a bit and I noticed that if you click or press required keys to fast the tutorial breaks ops... I would suggest that you play in fullscreen and wait for both windows to pop up at the water bar. Then you hold left click on water bar until the water is completely gone. I hope this helps and thanks for playing!
*Edit: I found solution: after the second pop up pops up hold the left click on water bar. I screwed up: water rising factor becomes bigger than factor of water lowering when you hold the left click.