This reminds me of early BASIC games that would run on IBM PC, compatibles, and other early computers with BASIC interpreters. I remember one such game that was almost exactly this.
I recall typing this exact game into the old Amiga, in the AMOS Professional interpreter, from a code listing in some magazine. It was not a very long code listing, but significantly more than 960 bytes! It had sound effects, too, and I think it scrolled the opposite direction. I guess that made it a racing game, not a skiing game.