Added new game mode called Typing attack.

Features:

• Prompts the player to spell words displayed on the screen, for each word spelled your ship will fire a weapon at the enemy.
• For every incorrect key input, the enemy will fire back.
• The faster you spell, the higher your combo points will go, and the more space coins you can earn.
• Displays your Words Per Minute score in real time so you can see your typing skills in action.

Also added the first of many Steam Community Leaderboards.

• Added leaderboard for Standard Mode highest level
• Added leaderboard for Hardcore Mode highest level

Watch out for more leaderboards in future updates!