I agree, your app looks dangerous in a good way. I think the most important thing is that the loading animation be anchored to the bottom of the loaded content

I agree, your app looks dangerous in a good way. I think the most important thing is that the loading animation be anchored to the bottom of the loaded content so that it never obscures content that's already loaded. If the user manages to outrace your loader and gets to the bottom, some kind of indication that the app is churning away would no doubt be welcome.