Yeah _0ffh's point makes sense on the path found. But even if it finds a path that is basically one horizontal one vertical line, it should still check the immediate neighbors only.

Yeah right, in that case there's something wrong there! Maybe in the way it queues up the options.

Think I found it, if you change the sort in astar.ts to just return 1 or -1 based on the comparison it behaves like A-star.

   untraversedTiles.sort((a, b) => {
      if (heuristicCost[a.row][a.col] < heuristicCost[b.row][b.col]) {
        return-1;
       }
      return 1;
    });