[ ] pause/suspend app when not in focus to save resources
[ ] screen orientation support
[ ] fix TODOs and FIXMEs in the code
[ ] improve code quality (+ best practices)
[ ] effect after pressing start game?
[ ] add more images/icons
[ ] remember last selected gamemode?
[ ] some kind of achievements
[ ] investigate: shared preferences for configs
[ ] improve fullscreen logic + support for screen cutouts
[ ] dim screen after time (don't turn off)
[ ] START/RESTART GAME button/text replacement idea: instead of text press any circle on the screen (demo) or have a dedicated clickable circle on the middle to start/restart (by @maheleanmark) [START/RESTART not intuitive enoug]
[ ] multiple motivation messages based on how close to last highscore
[ ] reset all highscores button (recycle bin icon)
[ ] shadow under drawables (images)
[ ] find a better trophy icon?
[ ] NEW HIGHSCORE text to show beside the crown icon?
[ ] more vibration feedbacks
[ ] X mark not intuitive enough on RESTART SCREEN - same style as last bubble?