[gus_massa]

Do the different levels change how complex the questions are or just the speed? (Like carry vs no-carry operation, multiplications, ...)

PS: Make a version with a unicorn whose farts are rose petals to make your sister happy.

[creature_x]

As you progress, the questions get more complex and the speed gets faster! If TurdTurf doesn't take off, then UnicornMath surely will (: