Fix x/y coordinate swap in sprites

src/display/structs.rs

@@ -43,8 +43,8 @@ impl Sprite {
     pub fn load(buf: &[u8]) -> Self {
         assert!(buf.len() >= 4);
         Self {
-            x: buf[0],
-            y: buf[1],
+            x: buf[1],
+            y: buf[0],
             tile: buf[2],
             flags: buf[3],
         }