private void btnPlayCPU_Click(object sender, EventArgs e)
{
this.Hide();
UsernameForm username = new UsernameForm(1);
username.Closed += (s, args) => this.Close();
username.Show();
}
private void buttonSubmit_Click(object sender, EventArgs e)
{
this.Hide();
UsernameForm username = new UsernameForm(0);
username.Closed += (s, args) => this.Close();
username.Show();
}