learning/practice solidity

burn.sol

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+//SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.13;
+
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract token is ERC20("MahithTest","MCT"){
+
+    address public creator;
+    mapping(address => uint) public points; 
+
+    constructor() payable{
+        creator = msg.sender;
+    }
+
+    modifier onlyOwner(){
+        require(msg.sender == creator, "Only owner is allowed");
+        _;
+    }
+
+    function mintNewToken(uint amount) public onlyOwner{
+        _mint(msg.sender, amount);
+    }
+
+    function burnAndAdd(uint amount) public {
+        _burn(msg.sender,amount);
+        points[msg.sender] += amount;
+    }
+
+    function burned(address check) public view returns(uint){
+        return points[check];
+    }
+
+    function win() public {
+        if(points[msg.sender] > 5){
+            selfdestruct(payable(msg.sender));
+        }else{
+            revert("you don't have enough tokens to win");
+        }
+    }
+
+}