The flashes & big numbers are annoying

I love girls generation and their songs. But after spending my money buying songs for this app, I dont wanna spend more money buying eye glasses because in the middle of playing Dancing Queen my eyes just started hurting from bright flashes and annoying numbers! The visual effects are not good for the eyes. I was trying to focus on what key to press but the flashes & numbers just distracts me.

Please fix and Ill re-review it.

yoonabie about Girls' Generation SHAKE