I have this same issue. However it doesn't bother me because I know my graphics card sucks ass. I kind of expected things to not be at their best on my pc. How I get through the intro and ending is to constantly press enter until it finally registers it (which usually takes just a few seconds). One unrelated thing I found might possibly be an oversight. When in Time Attack mode, water does not effect time at all in the Special Stages. It might be intentional, but I don't see why it would be. That is, unless the original game did the same thing.