Hi - I have a new puzzle (currently accessible for preview/play-testing only) that might appeal to this audience: http://clickmazes.com/js/num99.htm
It's my first puzzle written in HTML5 so you can play it on most devices (it's a bit rubbish on phones - I've still got a lot to learn about making content adapt automatically to small screens and still be accessible).
You can also solve it as a paper-and-pencil puzzle. I'd actually recommend this, for level 4.