I’ve just been putting in sokoban-like boulders in (although it might not be obvious yet I do have a plan here!) It was pretty irritating to do, and it was something I’d picked as “oh, that’ll be easy”, so also somewhat annoying.

The difficulty came from having sokoban-like elements in a game that has smooth-ish player movement, complicated further by wanting the boulders to be affected by the ice and springs in the same way as the player is. In other words, “Now entering Special Case City, population YOU!”

I expect there’s a few odd cases I’ve not caught yet, but I think (hope) the worst of it is over now. Check them out in this build.