That app shouldn't use many resources with simple graphics like it has, yet it heats my phone running Android 6.0.1 like crazy. Thanks to case my son still can hold it. Developers please do some performance testing before releasing a game to public. EDIT: The Nexus 6P overheating has to be an issue known to Pango development team alone, as it's the fist app which actually caused that on my phone, which I had for 4 months. Don't blame hardware if you can't optimize processes on a software side. Dropping one star. App already uninstalled.
My son loves it