Thanks for your feedback! I'm glad you enjoyed, even if it's not your typical genre. :)
I have some ideas of how to expand the game, but as I think you've surmised, continuing down the shapez route is relatively challenging since it's pretty hard to come up with an intuitive way to count sequences more quickly or in parallel. I think for a full game version it'd be better to lean more Zachtronics-like and split the game into several optimization puzzle levels, each one building a different sequence.