Input is picking up modifier keys

[SabareeshIyer]

Once the page is opened in the browser, using keys other than input keys on the keyboard starts the countdown timer and begins the game. This prevents the user from switching tabs in the browser or other windows; calculator keys, function keys, meta key, etc.

List of keys to be exempted from this list (non-exhaustive): Meta, Shift, Control, Alt Delete Calc, NumLock F1-F12 Escape, Tab, CapsLock Page Up, Page Down, Home, End

Immune key(s): PrtScr