Time Squad! New features!

People were generous/daft (delete as appropriate) enough to actually pay some money for this game!  This is obviously great and so I added some more features:-

• Grenades!
• Level Selector - you can now jump to any completed level and also the next highest
• Difficulty level - Easy, medium or hard, which affects whether your own troops block friendly fire, or are actually harmed by it.
• Another new level!

Here's a short simple demo of the game in action:-