One more note about safety when it comes to open source or FOSS, is that you should use only the main repository and distributions provided by the official team. Often people clone existing repo, insert malicious code and publish it as their app on play store etc.
Witcheye is a good version of flappy bird, as its controlled with only one finger, with extremely difficult platforming.
Supermeat boy forever, great game all around but very difficult.
I did not! Do not drag me into this entire mess.
I think you would be surprised how much math used in physics is used in economics and then there is statistics which is heavily used in both.