Middleman contract example for DevConnect Game

Caller.sol

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

//       x ----->
//      _______________
//  y  |____|____|_____
//     |____|____|_____
//     |____|____|_____
//     |____|____|_____

enum MoveDirection {
    Up, // 0
    Down, // 1
    Left, // 2
    Right // 3
}

struct Position {
    uint8 x;
    uint8 y;
}

interface IGame  {
    function register() external;
    function collectTokens() external;
    function collectHealth() external;
    function update(address newContract) external;
    function move(MoveDirection direction) external;
    function currentPosition() external view returns(Position memory);
    function positionOf(address player) external view returns(Position memory);
}


import "@openzeppelin/contracts/access/Ownable.sol";

contract Caller is Ownable, IGame {
    IGame public registry;

    constructor(address _registry, address _owner) {
        registry = IGame(_registry);
        transferOwnership(_owner);
    }

    function setRegistry(address _registry) public onlyOwner {
        registry = IGame(_registry);
    }

    function register() public override onlyOwner {
        registry.register();
    }

    function move(MoveDirection direction) public override onlyOwner {
        registry.move(direction);
    }

    function collectTokens() public override onlyOwner {
        registry.collectTokens();
    }

    function collectHealth() public override onlyOwner {
        registry.collectHealth();
    }

    function update(address myNewContract) public override onlyOwner {
        registry.update(myNewContract);
    }

    function currentPosition() public override view returns(Position memory) {
        return registry.currentPosition();
    }

    function positionOf(address player) public override view returns(Position memory) {
        return registry.positionOf(player);
    }
}