advanced solidity

airDrop.sol

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+//SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.13;
+
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract airDrop is ERC20("AIRDROP","AIR"){
+
+    address public creator;
+
+    constructor() payable{
+        creator = msg.sender;
+    }
+
+    modifier onlyOwner(){
+        require(msg.sender == creator, "Only owner is allowed");
+        _;
+    }
+
+    function mintNewTokens(address[] memory addresses, uint amount) public onlyOwner{
+
+        for(uint i=0;i<addresses.length;i++){
+            _mint(addresses[i], amount*(10**18));
+        }
+
+    }
+}

timeToken.sol

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+//SPDX-License-Identifier:MIT
+
+pragma solidity ^0.8.13;
+
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract timedToken is ERC20("TIME TOKEN","TT") {
+
+    mapping(address => uint) public lastSpent;
+    mapping(address => uint) public alreadySpent;
+    mapping(address => bool) public exclusions;
+
+    uint public limitPerDay = 5;
+
+    function timedTransfer(address to, uint amount) public {
+        if(exclusions[msg.sender] == false){ 
+            if(block.timestamp - lastSpent[msg.sender] > 1 minutes){
+            lastSpent[msg.sender] = block.timestamp;
+            alreadySpent[msg.sender] = amount;
+            _transfer(msg.sender, to, amount);
+        }else{
+            if((alreadySpent[msg.sender] + amount) > limitPerDay){
+                revert("limit exceeded");
+            }else{
+                lastSpent[msg.sender] = block.timestamp;
+                alreadySpent[msg.sender] += amount;
+                _transfer(msg.sender, to, amount);
+            }
+        }
+        }else{
+        _transfer(msg.sender, to, amount);
+        }
+
+    }
+
+    function mint() public{
+        _mint(msg.sender,5);
+    }
+
+    function addToExclusion(address exclude) public{
+        exclusions[exclude] = !exclusions[exclude];
+    }
+
+}