From Chris Sawyer´s page (Thanks now inc):
Despite successful compatibility testing of the Beta build of Loopy Landscapes under Windows 2000 Professional, somehow a bug crept into the code between Beta and the final build which prevents the game running under Windows 2000. Because Windows 2000 compatibility isn´t supported by the publisher, the final build didn´t undergo any Windows 2000 testing, and the bug doesn´t manifest itself under Windows 95, 98, or ME. After all the effort which was put into making Loopy Landscapes ´unofficially´ fully Windows 2000 compatible this is a real shame - This situation should not have happened. An updated build (V1.20.013) is being prepared for production, but in the meantime the game will only run under Windows 95 or 98, as is stated on the box.
Despite successful compatibility testing of the Beta build of Loopy Landscapes under Windows 2000 Professional, somehow a bug crept into the code between Beta and the final build which prevents the game running under Windows 2000. Because Windows 2000 compatibility isn´t supported by the publisher, the final build didn´t undergo any Windows 2000 testing, and the bug doesn´t manifest itself under Windows 95, 98, or ME. After all the effort which was put into making Loopy Landscapes ´unofficially´ fully Windows 2000 compatible this is a real shame - This situation should not have happened. An updated build (V1.20.013) is being prepared for production, but in the meantime the game will only run under Windows 95 or 98, as is stated on the box.