Gamebalancing - Making game easier
- Made levels easier
- Made boss easier/longer
- Melee enemies can not hurt player unless they overlap during "attack phase" | polished enemy attack animation
- Added GUI-countdown during games
- Can customize a wave spawn

Signed-off-by: Daniel Dahlkvist (home) <messer_@hotmail.com>
Moved old levels (7-9) into 11-13 and expanded total levels into 20 (2 sets)

Signed-off-by: Daniel Dahlkvist (home) <messer_@hotmail.com>