I have finally finished the game. Yay!
I just needed to talk more to the pink guy, that's all.
Then I used the fan on the man near the atm. And I got the ticket and went to station.
And I really didn't need that blue cap after all hahahaha.
The game was very good. The sudoku color part kept me playing this in 2-3 days and that is the only part what I really want to forget now from that game hehehehe.
Thank you so much for the hints you gave to me. That was very helpful.
And I wish you a Merry christmas.