Good job! But it's better not to keep your data in your activity class, so the level won't reset when the app goes to background.
Recommend it! The best fractions game...
v.1.0.3 r.4 Added pink unit fractions in squared square.
v.1.0.2 r.3 Fixed layout details (August 2016)
v.1.0.1 r.2 Added tiny yellow dragging popup over square frame (july 2016)
v.1.0.0 r.1 first version. Tiny issue in radio buttons.(june 2016)