take a look at the
execute file and
execute executable commands if you desire one program (ie, "Arcade.exe") to launch another (ie, "Asteroids.exe").
as for passing a value (ie, a player's current "Cash") from one program to another, i think the simplest solution is to write a file containing, say, the player name and their current "bank account" while directing each game in the arcade to read and update the amount accordingly.
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