it never worked very fast. and it takes ages to load up the levels but the actual game itself is not that slow. I am sure that if someone had perfected the port it could have been accelerated but I am grateful for what we've got. After all its free of charge. And bear in mind that the official recommendations for version 1.1 are "computer with at least 1 GHz and 512 MB RAM" .I would say we're lucky that it works at all.