Thanks for your reply!
My problem is that all the songs until here can be played like this:
DO - 1st finger
RE - 2nd finger
MI - 3rd finger
FA - 4th finger
SOL - 5th finger
Which is great because I have learnt to find these notes without looking at the keyboard.
But Fingerobics #8 doesn't allow me to do that anymore so I end up playing everything from LA with my little (pinkie) finger. This can be appreciated in the videos (I hope):
Playing all the higher notes with my little finger means I can't play without looking at the keyboard any more so I am terribly slow and clumsy.
And another one, still pretty bad I must say
(BTW I tried to make the video myself, I ended up taping the camera to a shelve with sellotape

)