With the development of the web service for my own high score system I decided to also create a web version of Gem Square. You can play it at webgames.mystictri.com The game is implemented as a Java Applet and uses the same game code as the Android version. It has its own weekly and all-time high score board that is viewable on the web page. I think the mouse interface works quite well considering that the game was designed for touch screen devices. Give it a try and let me know what you think.