Science Games

right i just brought guitar hero threegame, and if anyone has got it they will know that the buttons move towards you in the game like a car coming towards you. This is fast and when i finish a song and stare at something it seems to move.. i know it doesnt and after a while it goes. this only happens when i play the game and i have never experienced this b4..only when i span a sprial thing (out of a kids science mag thing) that was SUPPOSE to give this allusion. What i want to know is, is it okay to experience this after the game or is it doing damage to my eyes? and does anyone else experience this.