1.5.4
  * added translators to the credits-screen in the game
  * added Dutch language (thanks to Heimen on weblate)
  * added Galician language (thanks to Iván on weblate)
  * improved Spanish translation (thanks to Markel on weblate)
  * removed transparent pixels from screenshots

1.5.3
  * added adaptive icon (Android 8 and higher)
  * disabled background zoom near the apple
  * added Norwegian language (thanks to Allan on weblate)

1.5.2
  * added Portuguese translation
  * made the winner and the highest points more colourful
  * activated hardware back-button to leave the game or go to previous screen
  * fixed Polish and Esperanto translations (by Verdulo)
  * bugfix: language selection sometimes not working
  * added GPL3 and gitlab badges to background
