Love our Embryon too. It still needs some work too but is quite playable now.
The flash in the center only activates when the shot is perfect, meaning both the messenger balls strike the targets in the back at the same time, this will light 2 Embryon letters...

Does anyone know anything about the two different backglasses? Like the history of why there were two, or how many of each were done? Seems there are blue ones and purple ones... or is one color a faded original?..