Very cool! Simple and really well composed. I suspect there must be a "decisive moment" somewhere in there, but I dare not open that can of worms again
There is even a color harmony present. However, it got me thinking. Harmony is beauty, and it seems to me that the beauty here is distracting from the main focus: geometry and moment. A case when something could be too beautiful (color harmony in this case) for its own good? Perhaps a b&w would solve that problem?
In any case, bravo, Seamus!