Thanks for the comments!
Okay, so first I thought "Man, this one is really hard"; then I thought (while playing the second time) "Okay, it's not too difficult", but now I see that my fisrt opinion was right.
Anyway, sorry for not giving any help. I was away for about two days, and I really hadn't seen that cry for help that was posted before I went.
And I have to admit that I visit this section very rarely in the last time. I rather create/solve WA levels. And while MOFI is developed, I really won't do any RTW levels any more. Maybe I'll give it another go after it's finished, but I'm not sure yet.