Laser Dog Games’ Hopiko ($0.99) is a great game with a great soundtrack. The only problem is that the game at launch would have you just play one track over and over again unless you changed it. Which is fine if you enjoy that one track, but if you spend 15 minutes on one run, that song will become the soundtrack to your nightmares. Not any more – now you can shuffle tracks in the game, ensuring that your nightmares are full of a variety of the game’s fantastic soundtrack.
Speaking of nightmares, have you ever felt like going through all 10 runs in a stage, for a total of 50 levels in one go? Because, you know, you have some deep-seated issues you should seek therapy for? Well, until then, Hardcore mode lets you try to complete all 50 levels in a stage in one go, tracking your score and best time. I only hope that Laser Dog never implements a Super Hardcore mode where you try to go through every level in the entire game in one go. That would be bonkers. Please don’t.
Update: Oh no.
"Super Hardcore mode where you try to go through every level in the entire game in one go" NOW THERE'S AN IDEA @wondroushippo
— Rob Allison (@roballison) November 5, 2015
And lest we forget, the game’s on sale for $1.99 from its $3.99 regular price, too, so you can go mad from this game at a discount! Hooray!

I've had similar delay problems with games like guitar hero in the past.. it can sometimes be down to the audio conversion path in the TV (or stereo) depending on how you've got your speakers hooked up.. I also noticed there are some delay compensation settings in the AppleTV settings somewhere (I forgot which menu I was in sorry)
basically digital audio is a pain for this kind of thing as every appliance in the chain is likely converting it to analogue and then back again at some point
Hmm... I haven't experienced any delay problems playing the game on my Apple TV. I can only assume it's your TV or sound system causing the trouble. Can't remember off the top of my head but does the game have a calibration setting?
Why did you need an Apple TV to play guitar hero? Don't you own a console??