Yes - retina support still in the pipeline. I have it running at higher res, but I'm having to re-author all the darned graphics again.
This is going exceptionally slowly due to my time being split between Fluttermind stuff and Another Place stuff where there are 4 (still unpaid) guys requiring my attention.
Anyway, excuses aside, it should happen and - as ever - thanks so much for your patience.*
As it is, I'm considering handing Inco over to someone else so you guys and the game you bought can get the attention you deserve.
*P.S. This is why single dude companies don't rule the world.