The models are black. Game runs perfectly aside from that, everything else is visible, no slowdown issues, menus all work. When i press my home button, the models become visible for a second before the app closes, so i doubt its my device not being able to display the models. My device is a samsung galaxy exhibit t559 android version is carbonROM 4.4.4
Thus seems to be a common bug. You can try running it on low res mode in the settings. Also you should take screenshots and email support@rovio.com
We've got a fix for the 'black' issue that's occurring on some devices coming next week - hopefully this will fix it on your device!