Saviors update to 1.2

Update Notes:
- Changed game FPS to 120, for slightly smoother gameplay and controls
- Fixed last boss crystals to shoot again properly
- Changed enemy bullet glow to black
- Homing projectiles no longer prioritise dead turrets
- Fixed game cleared screen for replays
- Mech boss in stage 3 has had its red projectile graphics changed
- Fixed disappearing hand for mech boss
- Random replay breakdown fixed
- Replays now correctly remember bonus shields gained
- Added help to explain the differences between game modes and scoring