If you like Lemmings give Age of Tribes a try! The iOS title is now available for Mac users. http://itunes.apple.com/app/age-of-tribes/id403714091?mt=12
Update 1.1 has been submitted today - with several improvements for MAC users with more then a single mouse button. Imroved game controls: - hold right mouse button and move the playfield anytime in any gamemode - zoom in and out with your mouse's scroll wheel - ESC key quits the game Bugfix: - prevent game from switching into fullscreen mode (fullscreen is not supported yet) Btw., Age of Tribes got featured in the games section from the very first day. Thanks Apple!