[Knuckles]

NPC Code:

---

for (i = 0; i < 4; i ++) {

  if(keydown(i)) {

    this.x += vecx(i);

    this.y += vecy(i);

    break;

  }

}

---

instead of 900 lines of key detection...you can do the same for playerdir detection.
learn vectorx, vectory. think of it as an array.

vecx = {0,1,0,1}
vecy = {1,0,1,0}

so vecx(0) would = 0;
vecx(1) would = 1;
vecx(2) would = 0;
vecx(3) would = 1;