Try some of these games:
Coordinates:
http://resources.oswego.org/games/BillyBug2/bug2.html
http://www.counton.org/games/flash/virtualmathfest/dinosaur.swf
Reflection/Symmetry
http://swgfl.skoool.co.uk/content/keystage3/maths/pc/learningSimulations/ASXSC/launch.html
http://www.matematicasdivertidas.com/Zonaflash/juegosflash/reflexiones.swf
Plus the BBC game below: