This is Take It Easy!, originally made by Peter Burley, cloned by me. The rules are simple: make rows of the same number. If a row of one number spans the entire board, you get that many points for each piece in the row.
If you want to play the game on your machine locally, download it. The same JAR file will also work as an application. If it doesn't work at all, you'll need the latest version of Java to run it. If you have a Mac, it will work, you just need to configure Java 5.0 properly in Safari.
This was made in less than a day using a Mac, Eclipse, Java 5, and a library I built specifically for prototyping games. If you'd like to use my library also, send me an email. The source is in the JAR file, but I'd appreciate it if you asked me before using it.