Michelle, I've had a Real Arcade account for years. I feel your pain, girl.
Here are some suggestions from the R/A site..hope they work!
1. Download the Real Arcade stub...it's free, and simply a handy interface for all the games (much like Wild Tangent and Reflexive arcades).
2. Sign in ...sign up is also free.
3. Go to the \\Program Files\Real\RealArcade\ folder where you have RealArcade installed and look for a file called tmp.rgp. If that file exists, delete it, restart RealArcade, and try your download again.
4. Clear your Temporary Internet files inside of Internet Explorer:
Start Internet Explorer
Click the "Tools" menu.
Click "Internet Options"
Click "Delete Files"*
Try your download again
*Note: This operation may take a few minutes to complete.