As Steempipe says, a pic/screenshot is needed to get an idea what sort of problem happened.

Can't you upload a picture of it?

Maybe, your water is not seemless? Just a guess.

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt