Its alright...
A few issues. Best word for orange is 橘黄, but the app first teaches 橙色, then later goes to 橘黄 without instruction.
男子 not the best basic word. 男人 or 男的 are better first words. Same for woman. 女人 or 女的 are better first words. Duck is usually 鸭子.
Otherwise pretty solid. Pronunciation not the best, but not bad.
Yoshi Cookie about Chinese for Kids