Make sure your browser has plenty of memory and disk cache available. Mode 3 Displays a multi layered parallax background and additional sprites. Turning this option on smooths the pixels in the horizon but also requires a fair amount of processor power. A Pentium computer with 16 megs of ram, and Netscape 4.0 or Internet Explorer 4.0. The game works on all operating systems that are using the previously mentioned browsers.
Every system has different settings concerning the mouse.
If the mouse reacts too slow or too fast you may need to adjust the computer's mouse settings and select a different mouse speed. It is recommended that you play Concrete Dreams on a fast pc. You will never know if you don't give it a try.