Works fine on my N900, it's a very nice game!

My N900 can do things iPhone/Android/Symbian users can only dream of - when the Nokia dude said this is a computer in your pocket, he was NOT exaggerating!

Maybe you should reflash your phone - COMPLETELY including the eMMC aswell. 9 times out of 10 this gives me a nice clean tingly feeling about my phone and apps generally work much better.