I swear that every single time that I saw a game that looked totally awesome, it turned out to be unsigned and I couldn't install it on my phone. Many of my days have been wasted on trying to find a way to sign them, nothing worked. It seemed like signing applications would forever stay an impossible dream. Until finally, I found a blog about a Chinese website where you could register and download a program that signs your apps. I didn't have much hope that it would work, after all, nothing ever worked. But it did. Now I'm a happy person that can play awesome games, like spb brain evolution, marble maze and many many more.
Here is the awesome blog with instructions. Thank you.