I truly enjoy playing this game for myself, but the planning and problem solving aspects also make it a good tool for my clients with disabilities. My only suggestion would be to add a control that allows you to move forwards (or backwards) through the levels without having to back to the main screen. Maybe just through the levels a person has unlocked. That would be great for picking new levels to work on with a client.
Erin.ot about sugar, sugar, v2.0