I asked Apple for a refund, since I didn't get any response from the developers.
The company posted a fix days after my complaint that was supposed to fix the "black screen" issue, but I didn't bother to check.
I just bought the StandBy game via Apple Store for my MacOSX 10.10, and it just doesn't work properly.
The only thing I get when I start the game is a black static screen with some music playing in the back.
What should I do?