I found that setting the correct resolution and providing the right images when releasing games with Ejecta quite difficult. There are various factors that influence the resolution and since my first few attempts were kind of broken, I ran a series of tests that document how different changes affect the resolution on your iPhone.

I wrote it all down here:

http://www.ntaso.com/ejecta-impact-js-which-resolution-for-iphone/

I hope it saves someone time, if you want to either:

- achieve pixel-perfect resolution with no scaling
- achieve a factor 2 scaling
- achieve a factor 4 scaling