Wrong sounds
Overall very pleased
That said, I'd like to see two changes. First, could the engine say the word and the individual cars say the sound? We talk about isolating the sounds of CVC words. For example, "What is the first sound you hear?" I think it would be nice to have a way for the player to check it out.
Engine: cat
1st car: /k/
2nd car: /a/
3rd car: /t/
Secondly, could a picture of the word ride the train? Unless you are using nonsense syllables, I think a visual of the word would be a lovely addition to the app.
Overall, I am very pleased with this app. A few changes would make it spectacular.