So I just purchased Sonic CD from steam, but I'm having problems. When I launch the game, it presents the usual "Press Start" screen. The problem is, no buttons seem to work. I have tried every button on the keyboard, but none will start the game. Can anyone give any suggestions?

I don't have one of those. Is that really the only way I can play it?

First, reinstall the game.

Have you tried using other games with the keyboard? If not, load up another game (or a random Flash game) using keyboard controls.

If that game also doesn't work as well, uninstall any unwanted keyloggers that may be lurking in your computer and run a virus check. If you have a Auto-Correct spelling program, disable it. That fixed my problem when I put TF2 in my new laptop, but I've heard the Steam version of Sonic CD is pretty broken in the first place.

I would suggest getting a USB controller though. An official wired 360 one is best, but there are cheaper alternatives which are pretty good, like this one which I have: http://www.amazon.co.uk/gp/product/B0046A8HU0/ref=oh_details_...

Get an iPhone.