- Fixed some bugs in title screen.

- Added parallax effect for stars !

- Buffed Infectors. Now they appear faster, making the game slightly more fast-phased, and shoot the prediction shots more frequently.

- I thought the early waves are too easy and allows the players to reserve over 10 ships too easily, so i increased the early wave's difficulty. If you don't be cautious, You'll lose several ships easily. The max difficulty is still identical.