the author of this app says:
Jewels is a simple, yet quite polished puzzle game, more specifically a Bejeweled -clone. I started it as a XNA programming exercise for myself, making it also my first C# program. Nevertheless, it is still quite fun to play. :)
XNA 2.0 framework runtime and .NET 2.0 runtime environment to run under Windows XP SP2 or Windows Vista. Or it can be downloaded via the Android Marketplace.