private void wallCollisionCheck()
{
if (Position.X > screenWidth - radius)
{
position.X = screenWidth - radius;
Velocity *= new Vector2(-1, 1);
}
else if (position.X < radius)
{
position.X = radius;
Velocity *= new Vector2(-1, 1);
}
if (position.Y > screenHeight - radius)
{
position.Y = screenHeight - radius;
Velocity *= new Vector2(1, -1);
}
else if (position.Y < radius)
{
position.Y = radius;
Velocity *= new Vector2(1, -1);
}
}