problem

void SonicSprite::CalculateMovementSpeed(double deltaTime)
{
    if (GAME_ENGINE->IsKeyboardKeyDown(VK_RIGHT) || GAME_ENGINE->IsKeyboardKeyDown(VK_LEFT))
    {
        m_SonicVelocity += SPEED_UP_AMOUNT;
    }
    if (!GAME_ENGINE->IsKeyboardKeyDown(VK_RIGHT) || !GAME_ENGINE->IsKeyboardKeyDown(VK_LEFT) && m_SonicVelocity > 0)
    {
        m_SonicVelocity -= SPEED_UP_AMOUNT;
    }
}