My game is called Rail and in it you are a light blue square that has to help a red ball get to the purple exit. There are switches on the path and you switch them by driving over them. Meanwhile there are enemies that you have to avoid or destroy. I guess I should post something about my game, so here's a gif of me playing it very badly.

In this example I set up some switches right, but then the enemies chased me over them, causing them to switch back, costing me time and lives.

I won't do a postmortem because there isn't much to say. Except that for once I managed to set a reasonable scope - i.e., a game idea that didn't necessitate making large amounts of content right up until the end. In principle, this means I had a slightly more relaxed time and got a bit more time to polish. I have to admit that I still exhausted myself. At one point on the second day I wrote code to rotate a polygon. Because in my stupor I forgot that the HTML canvas already has the feature of drawing things rotated.