On Cobra11-games I found application "C11 for android". I downloaded it, but there I found files with strange extensions. No .app files present. What have I to do with it? May be, here anybody knows, what is it the application, and where can I find instructions for it (in english)? Download adress is such:
http://www.cobra11games.de/infusions/app/. Link - on the news page http://www.cobra11games.de/news.php. Thanks!

I guess that's just an "app" for Android phones so you can access that fan site (unofficial site, not related to Synetic or the publisher). It's not a game.
I haven't tried it, won't do so, I'm using mobile phones for phone calls only