Please fix the bugs! – Mixels Rush - Use Mixes, Maxes and Murps to Outrun the Nixels Review

My son loves this app, but after level 6 it becomes unplayable due to constant crashing. He is bereft. Please fix it! ??????
Review by GrahamRHill on Mixels Rush - Use Mixes, Maxes and Murps to Outrun the Nixels.