Ok so what i gathered was that your screen is cracked, it wont play certain games, and when you click the arrow to go down to see all apps that there are none there
I dont think certain games not playing would be because of your screen being cracked, the screen has nothing to do with the ability to play a game on your PC fortunately, unless it is a touch screen then that can cause some issues
As far as you not being able to see your apps when clicking the down arrow that might be a problem with the windows 8 app screen, there is a tool i like to use on windows 8 and 7 when they are beginning to show some issues its called Windows Repair AIO from tweaking:
http://www.tweaking.com/content/page/win...
This is the link to the tool, I would download the portable direct download version, its the easiest to use and just follow the steps, once you get to the end where is says to open repair menu, you will see a list of windows repairs, just check off what applies to your problem or any other problems you might be having, at the bottom of the list there are a few windows 8 repairs one is for the tile menu if I'm not mistaken, after that is completed you will have to reboot your PC, see if the problem still persists and then let us know