Im surprised by the 5-star reviews. Its good, not great. What I would change:
--The childs voices that say the words enunciate very poorly, so I usually have to say the word to my son so he can properly hear the starting sound (hes on the first level). For example, there is a picture of a hut--not exactly an everyday word--and all you really hear is the "ut" part of the word.
--If he chooses the wrong letter, a childs voice says something like "twy [sic] again" or "you can do it", but every time it says "thass [sic] okay", he thinks he got it right, not wrong. ("But Mom, she said thats okay!") Its not obvious enough whether he got it right or wrong.
--Whats with all the halloween backgrounds? Itll show a picture of the sun, the word "_un" and have witches on broomsticks in the background? What the ??????
--The words ARE NOT grouped by how easy they are to spell (just by the number of letters and the position of the letter within the word). So you CANNOT choose to focus on words with simple vs. blended consonants (like "c" or "s" vs. "ch", "sh", "sl", or "sp") or short vs. long vs. miscellaneous vowel sounds. This may be fine for a more advanced speller, but if your kid is just working on letter sounds, youll run into a lot of frustration.