Help me play Spherez!

Hi, so today I went to play my favorite game, Spherez. Then it played the ad but didn't go to the game. So I downloaded Adobe Shockwave like it told me to. Then, after it went to the ad and before it went to the game's title screen, 2 boxes pop up, both saying "This application requires an Xtra (Havok Physics Scene) that either does not exist or failed to initialize properly. Please make sure the appropriate Xtras are in the Xtras folder(s)." I click OK because I don't know what it is talking about. Then, after it goes to the title screen, I click Start Game. As soon as it reaches 100% a box shows up saying

"This Shockwave movie has errors that have caused playback problems.

Please contact the author of this content regarding this problem.

Shockwave is unable to continue."

Please Help!