private void OnMouseDown()
{
if (EventSystem.current.IsPointerOverGameObject(-1) == true)
{
return;
}
if (EventSystem.current.IsPointerOverGameObject(0) == true)
{
return;
}
if (characterStat.canLevelUp(gameManager.seed))
{
characterStat.increaseLevel();
gameManager.seed -= characterStat.upgradeCost;
gameManager.updateText();
}
}