I did not have the problem that other reviewers had. Could be that the developers updated the app already. I had the same app in iPhone but this Android version is much better. The sentences are organized better. Even though the app suggests for kids, it can really be used by anyone who is learning English.
Only the top half of the word shows when unsolved. Only bottom half shows when solved.
App requires user to put words in correct order. Uninstalled because app often would not accept correct word order.