Today marks the 88th birthday of professor Thomas Kurtz, who invented the BASIC programming language with his colleague John Kemeny.

To mark the occasion, the iOS and Apple Watch port of DONKEY.APP, a game originally programmed in BASIC by none other than Bill Gates, has been made temporarily available for free by its developers.

What better way to celebrate Kurtz’s birthday than by playing the modern port of a clunky old 1981 driving game?

Before Bill Gates was, well, Bill Gates, he was the 20-something software developer behind DONKEY.BAS, a simple yet frustratingly difficult PC game in which players drive a car along a stretch of road while avoiding donkeys.

Created in 1981 to show off the BASIC programming language on the then-new IBM PC, an updated version of the game has now been ported to Apple Watch.

Back in 1981, Bill Gates co-wrote a PC game called Donkey, commonly known (as some apps were back in those days) by its filename, DONKEY.BAS. If you’re old enough to remember those days and old enough to yearn for them, you might enjoy playing Donkey all over again on your iPhone.