・Implemented Charge Attacks
・Changed the behavior of the security drone, now the drone can be destroyed when exhausting.
・Added HP gauge; when HP reaches 0, the game is over. In the future, the player will be revived in the base after it's built.
・The UI of the title screen was slightly changed for better understanding.
Charge attacks can be used to capture enemies from any direction as long as the alien is not seen. Charge attacks will be a skill acquired after leveling up in the future.