Canvas Mouse Controller

// Outside Class
window.addEventListener('keydown', (e) => {
    e.preventDefault();
    player.idletime = 0;
    switch(e.code){
        case "KeyS":
        case "ArrowDown":
            // Move Player Down
            break;
        case "KeyW":
        case "ArrowUp":
            // Move Player Up
            player.isflying = true;
            player.velocity.y -= player.flightpower;
            break;
        case "KeyA":
        case "ArrowLeft":
            // Move Player Left
            keys.left.pressed = true;
            player.isleft = true;
            break;
        case "KeyD":
        case "ArrowRight":
            // Move Player Right
            keys.right.pressed = true;
            player.isleft = false;
            break;
    }
});

window.addEventListener('keyup', (e) => {
    e.preventDefault();
    switch(e.code){
        case "KeyA":
        case "ArrowLeft":
            // Move Player Left
            keys.left.pressed = false;
            break;
        case "KeyD":
        case "ArrowRight":
            // Move Player Right
            keys.right.pressed = false;
            break;
    }
});


// Inside Animate Function
// Handle left right movement
    if (keys.right.pressed === true && player.position.x < 600) {
        player.velocity.x = player.speed;
    } else if ((keys.left.pressed === true && player.position.x > 100) || (keys.left.pressed && scrollOffset >= 0 && player.position.x > 0)) {
        player.velocity.x = -player.speed;
    } else {
        player.velocity.x = 0;

        // Handle left right scroll
        if(keys.right.pressed){
            platforms.forEach((platform) => {
                platform.position.x -= player.speed;
            });
            stageObjects.forEach(stageobj => {
                stageobj.position.x -= 3;
            });
            scrollOffset += player.speed;
        } else if (keys.left.pressed && scrollOffset >= 0){
            platforms.forEach(platform => {
                platform.position.x += player.speed;
            });
            stageObjects.forEach(stageobj => {
                stageobj.position.x += 3;
            });
            scrollOffset -= player.speed;
        }
    }