Newgrounds isn't the place for maths...
I don't think Newground's is the place to put a maths game... People come on here after work or school to have fun.. not to do MORE work..
Anyway.. the instructions weren't that clear, although it's not hard to work out i suppose. The equations on the right hand side aren't structured in a way that makes it obvious what to do. You should have the missing numbers represented by a ? or something else.. i didn't realise you had to make the number in place of the X a multiple of the number on the left... until i messed about a bit.. you should make it more obvious how to play... But it was ok... for an educational game