Not nearly that old, but I'm reminded of the Casio calculators from the 80's that came with games. The one we had had a number matching game. It would for exam

Not nearly that old, but I'm reminded of the Casio calculators from the 80's that came with games. The one we had had a number matching game. It would for example spawn a 4, then you had two buttons, one to rotate through all the numbers and one to fire (ie. match). Over time it would spawn faster and faster, but it had different levels and some special game elements.