You certainly messed up the LEDs. Without current limiting resistors, the Arduino pins and maybe the LEDs would be damaged.
You may have messed up the buttons. With this type of button, connect only to 2 diagonally opposite pins and leave the other 2 pins unconnected.
Connect the buttons between the Arduino pin and ground. No need for pull-up/pull-down resistors if you use INPUT_PULLUP.
Your code is also messed up. It is 4 times longer than it should be. Use arrays and for-loops to avoid repeating code.
Whenever you find yourself copying and pasting code and making adjustments to each copy, stop, and think of a smarter way