Okay so I decided to play the game with joiplay to see if I can recreate the problem. I'm not running into it. also I'm not running into the stretching of the screen in the first pic. Are you playing the py version or the exe version on joiplay?
Edit: even when trying to add it as the exe it loads the py version. Suggest you just re-download the game as I'm having no issue with the game nor emulator