Can't find the Smash n Survive game on the app store?

I'm looking for some games can anyone point me in the right direction please?

I recently downloaded the full PS3 game called 'Smash n Survive' from the PSN store (it's terrible).

But I'd like to get hold of the iphone/ipad versions as well but I can't find them in the app store to buy?

Apparently there are 3 versions:

SnS
Smash&Survive
Smash n Survive HD

Is there any other place I can buy these?
I'm curious to see if they're anything like the PS3 game.

Cheers