Key fixes:
- Fixed the sword tracking bug by changing on_mouse_mmove to Pygame Zero’s correct on_mouse_move callback and using sword.pos = pos.
- Fixed dinosaur movement so they move at a steady speed toward the apple instead of accelerating wildly based on distance.
- Fixed the hit sound call to sounds.hit.play().
- Added basic score and missed-apple counters.
- Cleaned up naming, constants, and added comments around the important game logic.
