is Adobe Flash Player used to play all the games? if I uninstall it, will i stil be able to play?
No program, or app, or anything, on your computer should be using Adobe Flash Player any longer. The Adobe website recommends everyone uninstall Flash Player to help protect their systems. (The more computer literate people here can explain why this is.) https://adobe.com/ca/products/flashplayer/end-of-life.html
Green Felt does not use Adobe Flash! As @Sage said, do uninstall it!