........ it's a game, aptly named, "Magicians", although it is not magic related

The first few levels are failry easy, but I can assure you, it gets a lot harder.
Anyway, I've just completed all 32 levels .... *gloat mode* ....
Find it here:
http://www.coolmath-games.com/0-magicians
Quite a few other good games on the main menu, viz: hexep, bloxorz, truck loader, factory balls .... and prob a few other

Main menu:
http://www.coolmath-games.com/