The Previous Release contained an unsolvable puzzle.

Originally that puzzle was designed to prove the point that
* .. even with ever triangle reaching any spot on the playground 
* & even when  orientations on the gameboard do not matter, 
The puzzle can be unsolvable simply because of the symmetry of the playground.

The Challenge to win 200  & 300 € has therefore been reset. 
Daringlingo provided the insight that there is an unsolvable puzzle in the set. 

It sneaked in by mistake, getting exchanged with another similar puzzle.

This update now still has it, just so you can have a look.  I added a new puzzle on the duo-tetrahedron, which follows a similar pattern as the unsolvable should have. 
Enjoy a few nice hours of puzzling with this one ! :)