几何光学游戏，挑战智力极限，休闲小游戏，有一定难度哦。-Geometrical optics games, challenging mental limits, casual games, there is a certain difficulty oh.

几何光学游戏 一款挑战你智商极限的游戏 5关几个 10关入门 15关，您已经是天才啦，但是一共20关哦！-Geometrical optics limit of the game a game to challenge your IQ number 5 off 15 off 10 off entry, you have a genius about it, but a total of 20 off Oh!