Keeps crashing

I just bought this app to have a soothing lullaby for my daughter to go to sleep with. It is a cute app but it keeps crashing. This is really annoying since I have to keep going back into the room to restart it. Also I would like to have the option to have it play for longer than 1 hour. My baby sleeps for 2 hours. Another nice feature would be if I could have it change between the other lullabies. Like creating a playlist or something.

bamboobear21 about Lullaby Lamb, v1.1