reworked interaction of engine/frontend when closing
added a corner button for general actions during game
//
// Prefix header for all source files of the 'OpenGL ES app' target in the 'OpenGL ES app' project
//
#ifdef __OBJC__
#import <Foundation/Foundation.h>
#import <CoreGraphics/CoreGraphics.h>
#import <UIKit/UIKit.h>
#endif