Yes it is, ask a doctor if ATA game is right fore you.
Over use of ATA games may cause one or more of the following
Blurred vision
Sleeplessness
Loose stole
Atomic Diarrhea
Flakey skin
Zombies
Zombie kittens
Loose shoes
Stretched elastic on your underwear
Sudden squirrel crossings
And others.
So please for the love of ask a doctor if ATA is a right choice for you.