Directly from the”Giana’s Return”homepage:

WIP News 11th October 2003* The fourth beta test is done * 5 new levels are designed which makes a total of 30 levels now * 10 bonus stages are designed as well (those stages are designed, but it is not sure yet, if the first public version will have them included!)WIP News 10th October 2003* 4 new screenshots for your viewing pleasure.