I really don´t know what happened, I played it yesterday, everything was fine (except for two moments when the game froze for some seconds, then I pressed F12, a screenshot was taken and then it continued to work). Today, I tried to execute the game, the first time, I got a black screen with a cursor, then it came back to Steam/Desktop with the resolution I set for the game (1280x720), but I could hear the music of the game, like if it were on the background, but I couldn´t click anywhere, it kind of stuck on Steam/Desktop, then I had to reset, now, I can´t play it anymore because when I click play I see a black screen and the cursor for 2 or 3 seconds and then it goes back to Steam/Desktop with the normal resolution I use (1600x900). It´s totally strange because there´s no reason for the game to stop working by itself since I didn´t installed absolutely anything, there was no system updates, nothing, I really don´t get it, I saw another thread here similar to this one with NVIDIA users, but since my problem is not exactly the same I opened this one.

I didn´t execute it via terminal because I don´t know how to do it, when I try (by going to the game´s folder inside Steam) it says it cannot detect a Steam instance running.

Here are my specs: https://gist.github.com/Lord-Avallon/4521727