I have only one major thing to complain about so far, and it is that you can't reload your saved progress once you exit the game. I copied the save code into Pages, but can't paste it back into the window. I tried entering it manually (which took as long as you'd expect) and when I told it to load all the values in the game were set to zero and I was still at the beginning.
Might be something you want to fix first if you decide to tackle anything else about the game.