Corona SDK is described as 'Corona is a cross-platform framework ideal for rapidly creating apps and games for mobile devices and desktop systems. That means you can create your project once and publish it to multiple types of devices, including Apple iPhone and iPad, Android phones and tablets, Amazon' and is an app in the development category. There are more than 25 alternatives to Corona SDK for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Corona SDK alternative is Unity, which is free. Other great apps like Corona SDK are Qt, LÖVE, Qt Creator and Apache Cordova.
Qt doesn't seem to be a game focused development tool!