Very clever use of the theme! I've seen a lot of connected-through-space games so far, but this is the first connected-through-time game, and it makes for some good puzzles. It felt very satisfying to once I had a strategy that worked consistently. The escalating music is also a very good detail!
I think the only thing that felt off for me was that the red ball would clip through the wall if you went too fast. Other than that, fun game!