Always wish Exa could scale a little more. I understand that it's supposed to stay at the low level of coding, but when i realized unfolding loops was a very valid way to improve your score, I learned a lot, and also realized it's not quite for me.
All the joys of code reuse (as silly as that might sound) do get kinda lost in the game. I still loved it, but I'd kill for a sequel that was a little higher level on the tooling.