init project; draw first unit; fix loaded textures
added work stick control
refactoring move hero control
added simple button
added flying bullets
added gun and load gun to ship
refactoring access to mainScene and engine
added duals guns and remove bullet to base class
added correct delete bullet
added correct recycle cache bullet by type
added enemy ships)
added wall
fix wall for hero
added destroy enemy
remove bullet cache form gun class to bullet class
added multi bullet pool
refactoring multipool
refactoring bullet
added collision bullet and units
added bullet damage