Add some sort of random seed source
As we can not rely on the operating system for this, it would be neat to have a few bytes (like, 4 or 8), that are different on each invocation of w4. The intent is to use them as a random seed source, so that games whose level layout depends on random numbers don't always look the same. Anything would be fine, like a timestamp or something, as long as it changes with each invocation. Alternatively there could be a function to do that.