So far so good, you want to support the developers, however, you will quite simply cheated.
To shop for € 1.49 NOT the activation of the remaining UNLOCK LEVELS, but only ONE LEVEL package.
(And yes, it was in the truest sense of the word in the small print (only as Y x Y field indication) what is acquired.
It was, however, on the other hand, no indication that you can not complete the game unlocks)
THANK YOU, I WILL NO FUTURE IN - APP PURCHASES AND THUS developer support several days.