Right now I'm working on a terrain generator. It makes heavy use of arrays and subdivision to create a random terrain and then provides a menu so you can alter it, but each pixel/block is a full sprite object, which chews up the performance really fast - especially on phones, which is sort of what this is intended for.
(currently only new terrain/alter terrain work)
I know there has to be a better way to do this, but I'm not having any luck finding it. Any thoughts?