public void UpgradeTime()
{
//if reached lowest time clock
if (clock.timePerRotation <= clock.lowestClockTime)
{
return;
}
//check if can afford
if (thisGameManager.ChangeScore((int)-currentUpgradeCost))
{
audioSource.clip = speedUpClip;
audioSource.Play();
//increase stuff
upgradeCount++;
currentFloatMultiple = 1f + upgradeIncreaseCurve.Evaluate(upgradeCount * upgradeStepLengthOnCurve);
currentUpgradeCost = currentUpgradeCost * currentFloatMultiple;
//update stuff
TimeUpgradeButtonText.text = timeUpgradeString + ((int)currentUpgradeCost).ToString();
clock.ChangeTimerPerRotation(-perUpgradeDecreaseRotateTimeByPercentage * clock.timePerRotation);
}
}