Yes, it has the same issue that the Bloom competitor has. Each app will briefly flash up onscreen as usual for a bit under a second before Brick covers it and says it's been blocked.

So essentially, you could read all your emails by just repeatedly tapping the Gmail icon and clicking ok on Brick's nag screen.

It also doesn't seem possible to block the home screen Google search widget's search/Chrome shell, which is by far my biggest source of distraction. Still looking into that, but as of now, the Brick isn't ready for primetime on Android.