This app keeps freezing – Toca Robot Lab Review

When my son plays with it and he is trying to move the pieces up it keeps freezing. I have to keep exiting out of the app and coming back in. I notice when I move the pieces I don’t have an issue. The problem is my son gets excited and tries to swipe them all up and then it freezes. This is a poorly developed app.
Review by twostonesonebird on Toca Robot Lab.