Super Street Fighter IV: Arcade Edition Keyboard Keys to start the game?

Just have the Super Street Fighter IV: Arcade Edition for the PC and was stuck in the game menus because i don't seem to find a key on my keyboard to press start. I tried ESC, space and enter but none work. Any idea how to fix it or i got the keys wrong? I don't wish to buy a controller for that, so yeah i would appreciate if people can solve this question without having to buy a controller for it