change controls to wasd

src/main.cc

@@ -32,19 +32,19 @@ int main() {
                 auto available_positions = mmap->get_available_positions();
 
                 switch (ch) {
-                case 'j':
-                        player->move(direction::south, available_positions);
-                        break;
-
-                case 'k':
+                case 'w':
                         player->move(direction::north, available_positions);
                         break;
 
-                case 'h':
+                case 'a':
                         player->move(direction::west, available_positions);
                         break;
 
-                case 'l':
+                case 's':
+                        player->move(direction::south, available_positions);
+                        break;
+
+                case 'd':
                         player->move(direction::east, available_positions);
                         break;
                 }