Merge branch '4-set-up-minimal-gameplay' into 'master'

Resolve "Set up minimal gameplay"

Closes #4

See merge request !4

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.2
-app.versionCode=2
+app.versionName=0.0.3
+app.versionCode=3