I'm very pleased to finally release TRAIN, a game I've been messing about with for months and months. It started out as an attempt to build a nice interface that would look right in a very old point-and-click simulation game, and grew a lot from that aesthetic. It's definitely one of the things I've made that I'm proudest of with PICO-8, as minimal as it seems.
You have a large control panel for a very small toy train. The controls are supposed to be something of a puzzle. There are no instructions, only hints, but suffice it to say that you can make the train move. Fuel is limited, so the goal is to maximise your distance. Ideally, you won't go hunting in the source to figure out what the buttons do, but the buttons used are these:
Left Shift
Z
X
S
D
F
UP
DOWN
You should see a definite effect from most button presses, so most of it will be fairly simple after an initial trial/error period.
It's a weird little game, but I hope you enjoy it.