Matt,
Please note, we cannot guarantee the full functionality of this software on Intel Macs, because it is an older title originally coded for PowerPC processors, and does not run natively on Intel machines. Full compatibility will require the use of a universal binary update, which this title currently does not have. That said, it may still run through the emulator built in to Intel Macs, Rosetta (which it launches through automatically), but performance may not be optimal.
The issue you describe may be the result of a bad installation, a data error, a problem with a saved game file, or a conflict on your hard drive.
First, try repairing your disk permissions (if you have not done so already). To do this, Open up your hard drive, open the Applications folder, go to Utilities, and launch 'Disk Utility'. Under 'First Aid', select your main hard drive volume (usually labeled 'Macintosh HD') and hit 'Repair Disk Permissions'. Once this is complete, reboot your Mac.
If this fails to solve the problem, I would suggest fully reinstalling the game, and making certain all related files are removed to ensure a clean reinstall. Trash the main game folder, located on your hard drive. Check several other locations for files relating the game, and remove them. These include:
Home > Library > Application Support > SpongeBobMovie
Note that 'Home' refers to your personal account folder, an icon that looks like a house and is labeled with your user name.
Once you are sure all of these files are removed and the Trash has been emptied, you may reinstall the game. I suggest placing it inside of the Applications folder on your Macintosh HD.
Finally, make sure you have downloaded all of your Apple Software Updates. Ordinarily, this occurs automatically (through a prompt you receive every so often), but it's important to check these often. Updates, including Quicktime updates (which can affect many games) are also available on Apple.com.
If after this, issues continue to occur, there may be something that you have on your system causing a specific conflict. At this point, I would suggest completely uninstalling the game again, and reinstalling once more, but this time, to a separate user account on your Mac. If you do not currently have one, you may create one through your System Preferences, under 'Accounts'. Make certain that the new account that you make has full permissions to administer the computer. Once it is created, reboot your Mac, log into this new account, and install the game there.
Please let us know if you have any further questions.
Have a nice day,
Aspyr Tech Support