[gus_massa]

Are they randomly generated or you have a curated list? The difficulty increase too slow, but after 10 puzzles it starts to get tricky.

[xk4rim]

Hi! They are randomly-generated but in a controlled way (e.g. I tell it to make 1 equation with 1 option, or 5 equations with 8 options for some level).

I've made the first few levels easy on purpose just to get people used to the game.

And yes, it gets very tricky. Specially after 20-25 puzzles. :)

[mkl]

Is there a counter hidden in the page or a JS variable? I think I went further than that but it didn't get any harder.