update 0.5

UPDATE 0.5

-new features:

> plasma turret (30 damage)

> naval mines (500 damage)

> solar panel (energy)

> clock tower (shows wave countdown)

> new enemy: destroyer (800 hp)

> new spell 'Northwest Wind' (boosts wind turbines for a while)

-improvements:

> new hud

> keybidings

> new music track

> new audio effects

> more audio settings

-graphics:

> hd resolution

> new ocean tiles

> day/night cycle

and many game fixes