I thought Snow Rider would be a peaceful little winter game. A sled, a snowy hill, maybe a few seconds of pretending I was outdoors instead of sitting at my desktop. Then a tree appeared in my path, and I discovered that my idea of “plenty of time to move” differs sharply from the sled’s. The sled heads downhill on its own. I steer left or right with the keyboard, and I can jump when the course calls for it. That sounds manageable while I’m sitting safely in my chair. On the slope, my brain h...