Oh! Sorry about that. It does work on my end. Did you make sure to extract the files first? I had trouble running the .zip file directly, so I renamed index to Play Downhill to let people know where to click. Are you getting an error message, or just a black screen? What operating system and browser are you using? I hope I can fix this.
Okay. Hm. I'm completely new to MV (more of a VXer). The only info on this problem I can find is that a file may be missing or corrupted. You might have to download it again. If anyone else tried the game, I'd appreciate any feedback on this. In the meantime, since you're using Windows, you can try out the original version of Downhill, it's not that different.