If you're running into any problems running/playing those newly hacked Unity Games: You have to focus on TWO things - firstly, you have to download the newest version of Unity Web Player, which you can get from the developers site here -> Unity - Web Player Download (still if you have already installed it earlier, just download and install it again, then you'll get automatically the newest version, and the games will run again without any problems), second - if you have any adblocker, disable it for for the time, that you are want to play the certain game (don't worry, i got in that time no ads at all so far).
And as a side-note: One advantage of these Unity Games is, if you right-click in the games window, you can chose "full screen", for being it playable in that mode.