A friend has this phone

http://pdadb.net/index.php?m=specs&id=3711&c=lg_l55c_optimus_q_lg_gelato_q

He downloaded my game

https://play.google.com/store/apps/details?id=com.pathogengame.pathogen

And it is unresponsive when loading the first level.

I want to restrict based on screen resolution, maybe even CPU speed.

I don't see an option for CPU speed but I do see one for screen dp:

http://developer.android.com/google/play/filters.html

http://developer.android.com/guide/topics/manifest/supports-screens-element.html

My question is, how do I limit it to devices that have at least 640 pixel wide screens? What do I set android:requiresSmallestWidthDp to?