Download the following extra levelsets for Psychoballs. Just copy the file levels.dat into the original game folder (usaually C:\Program Files\Psychoaballs).
Please make sure to backup the orginal levels.dat file first.
Original Level-Set (50 Levels)
The original classic levelset for Psychoballs.
Level-Set (50 Levels) for advanced players
Thanks to Sven Furmanczak for these great levels.