Makey Makey Source Code Troubles

Errors:

Arduino: 1.6.13 (Windows 10), Board: "Arduino/Genuino Uno"

In file included from C:\Users\MAX\Downloads\MaKeyMaKey-master\firmware\Arduino\makey_makey\makey_makey.ino:49:0:

C:\Program Files (x86)\Arduino\libraries\Keyboard\src/Keyboard.h:29:2: warning: #warning "Using legacy HID core (non pluggable)" [-Wcpp]

 #warning "Using legacy HID core (non pluggable)"

  ^

In file included from C:\Users\MAX\Downloads\MaKeyMaKey-master\firmware\Arduino\makey_makey\makey_makey.ino:50:0:

C:\Program Files (x86)\Arduino\libraries\Mouse\src/Mouse.h:29:2: warning: #warning "Using legacy HID core (non pluggable)" [-Wcpp]

 #warning "Using legacy HID core (non pluggable)"

  ^

In file included from C:\Users\MAX\Downloads\MaKeyMaKey-master\firmware\Arduino\makey_makey\makey_makey.ino:52:0:

settings.h:20: error: 'KEY_UP_ARROW' was not declared in this scope

   KEY_UP_ARROW,      // up arrow pad

   ^

settings.h:21: error: 'KEY_DOWN_ARROW' was not declared in this scope

   KEY_DOWN_ARROW,    // down arrow pad

   ^

settings.h:22: error: 'KEY_LEFT_ARROW' was not declared in this scope

   KEY_LEFT_ARROW,    // left arrow pad

   ^

settings.h:23: error: 'KEY_RIGHT_ARROW' was not declared in this scope

   KEY_RIGHT_ARROW,   // right arrow pad

   ^

settings.h:25: error: 'MOUSE_LEFT' was not declared in this scope

   MOUSE_LEFT,        // click button pad

   ^

settings.h:42: error: 'MOUSE_LEFT' was not declared in this scope

   MOUSE_LEFT,         // pin A1

   ^

settings.h:43: error: 'MOUSE_RIGHT' was not declared in this scope

   MOUSE_RIGHT         // pin A0

   ^

C:\Users\MAX\Downloads\MaKeyMaKey-master\firmware\Arduino\makey_makey\makey_makey.ino: In function 'void initializeArduino()':

makey_makey:184: error: 'Keyboard' not found. Does your sketch include the line '#include <Keyboard.h>'?
   Keyboard.begin();

   ^

makey_makey:185: error: 'Mouse' not found. Does your sketch include the line '#include <Mouse.h>'?
   Mouse.begin();

   ^

C:\Users\MAX\Downloads\MaKeyMaKey-master\firmware\Arduino\makey_makey\makey_makey.ino: In function 'void initializeInputs()':

makey_makey:229: error: 'MOUSE_LEFT' was not declared in this scope

     else if ((inputs[i].keyCode == MOUSE_LEFT) || (inputs[i].keyCode == MOUSE_RIGHT)) {

                                    ^

makey_makey:229: error: 'MOUSE_RIGHT' was not declared in this scope

     else if ((inputs[i].keyCode == MOUSE_LEFT) || (inputs[i].keyCode == MOUSE_RIGHT)) {

                                                                         ^

C:\Users\MAX\Downloads\MaKeyMaKey-master\firmware\Arduino\makey_makey\makey_makey.ino: In function 'void updateInputStates()':

makey_makey:319: error: 'Keyboard' not found. Does your sketch include the line '#include <Keyboard.h>'?
           Keyboard.release(inputs[i].keyCode);

           ^

makey_makey:334: error: 'Keyboard' not found. Does your sketch include the line '#include <Keyboard.h>'?
           Keyboard.press(inputs[i].keyCode);

           ^

C:\Users\MAX\Downloads\MaKeyMaKey-master\firmware\Arduino\makey_makey\makey_makey.ino: In function 'void sendMouseButtonEvents()':

makey_makey:394: error: 'MOUSE_LEFT' was not declared in this scope

           if (inputs[i].keyCode == MOUSE_LEFT) {

                                    ^

makey_makey:395: error: 'Mouse' not found. Does your sketch include the line '#include <Mouse.h>'?
             Mouse.press(MOUSE_LEFT);

             ^

makey_makey:397: error: 'MOUSE_RIGHT' was not declared in this scope

           if (inputs[i].keyCode == MOUSE_RIGHT) {

                                    ^

makey_makey:398: error: 'Mouse' not found. Does your sketch include the line '#include <Mouse.h>'?
             Mouse.press(MOUSE_RIGHT);

             ^

makey_makey:402: error: 'MOUSE_LEFT' was not declared in this scope

           if (inputs[i].keyCode == MOUSE_LEFT) {

                                    ^

makey_makey:403: error: 'Mouse' not found. Does your sketch include the line '#include <Mouse.h>'?
             Mouse.release(MOUSE_LEFT);

             ^

makey_makey:405: error: 'MOUSE_RIGHT' was not declared in this scope

           if (inputs[i].keyCode == MOUSE_RIGHT) {

                                    ^

makey_makey:406: error: 'Mouse' not found. Does your sketch include the line '#include <Mouse.h>'?
             Mouse.release(MOUSE_RIGHT);

             ^

C:\Users\MAX\Downloads\MaKeyMaKey-master\firmware\Arduino\makey_makey\makey_makey.ino: In function 'void sendMouseMovementEvents()':

makey_makey:493: error: 'Mouse' not found. Does your sketch include the line '#include <Mouse.h>'?
       Mouse.move(horizmotion * PIXELS_PER_MOUSE_STEP, vertmotion * PIXELS_PER_MOUSE_STEP);

       ^

C:\Users\MAX\Downloads\MaKeyMaKey-master\firmware\Arduino\makey_makey\makey_makey.ino: In function 'void updateOutLEDs()':

makey_makey:688: error: 'TXLED1' was not declared in this scope

     TXLED1;

     ^

makey_makey:693: error: 'TXLED0' was not declared in this scope

     TXLED0;

     ^

makey_makey:699: error: 'RXLED1' was not declared in this scope

     RXLED1;

     ^

makey_makey:704: error: 'RXLED0' was not declared in this scope

     RXLED0;

     ^

exit status 1
'KEY_UP_ARROW' was not declared in this scope