I cant play the game

i buyed the game recently when i press start game doesnt open and dont shows anything
onsteam my friends sometimes see me switch in game and idle mode

Welcome to the Forum - could you give some more infos? Like your PC Settings and the log file.

im guessing you are on windows 10. this tends to happen more often for some reason. we indeed need more info.but things that have helped in the past for some people are:
-uninstall and reinstall
-unhook all usb things except mouse and keyboard, then try starting.
-if the above didnt work, hook up something like a wired xbox controller to the pc via usb, then try starting.

beyond that: is it a new pc? old? that kind of info would help