Not bad, but there are a couple things I think could be improved: the focus is pretty soft here, it's hard to make out if that's an eye on the egg or something else. This is just a personal preference, but I think if all the blocks were a uniform color or pattern it would be more appealing. Also, I'd like to see a little more of the egg. For this color combination, however, the frame works nicely
This is a cleaver idea but it is just too blurry for me. It looks like you are too close for the camera to focus. I wonder how this photo would look if it were lighted from inside of the prison???
Nice idea. To eliminate the glare, turn the flash off, and brace the camera against something. Maybe a cardboard cutout cell would give you more control over composition.