Quick compilation guide for Debian/Ubuntu (Windows is not supported, MacOsX should be okay though):
Download SDL Git repo from https://github.com/pelya/commandergenius,
install latest Java, Android SDK, Android NDK, and "ant" tool (sudo apt-get install ant openjdk-8-jdk),
then launch commands:
git submodule update --init project/jni/application/ninslash/src
rm project/jni/application/src # ignore the error
ln -s ninslash project/jni/application/src
./changeAppSettings.sh -a
android update project -p project -t android-23
./build.sh
That should do it.