Arduino Reading number of times a push-up switch is clicked - arduino

Question

I'm trying to read how many times a switch is clicked in 60 seconds in arduino. Referring to the documentation,I have implemented a countdown timer that counts down from 60s to 0. The button state is only being checked only one time per second. If I push the button more than one time per second, it registers as only one. What am I doing wrong?
Here's the code :
const int buttonPin = 2;
unsigned int Clock = 0, R_clock;
boolean Reset = false, Stop = false, Paused = false;
volatile boolean timeFlag = false;
int buttonPushCounter = 0; // counter for the number of button presses
int buttonState = 0; // current state of the button
int lastButtonState = 0; // previous state of the button
void setup() {
// initialize the button pin as a input:
pinMode(buttonPin, INPUT);
Serial.begin(9600);
SetTimer(0,0,60); // 10 seconds
StartTimer();
}
void loop() {
CountDownTimer(); // run the timer
if (TimeHasChanged() )
{
Serial.print(ShowSeconds());
Serial.println();
}
}
void StartTimer()
{
Watch = micros(); // get the initial microseconds at the start of the timer
Stop = false;
}
boolean CountDownTimer()
{
static unsigned long duration = 1000000; // 1 second
timeFlag = false;
if (!Stop && !Paused) // if not Stopped or Paused, run timer
{
if ((_micro = micros()) - time > duration )
{
Clock--;
timeFlag = true;
if (Clock == 0) // check to see if the clock is 0
Stop = true; // If so, stop the timer
if(ShowSeconds()>0 && ShowSeconds() <= 60){
buttonState = digitalRead(buttonPin);
// compare the buttonState to its previous state
if (buttonState != lastButtonState) {
buttonState = digitalRead(buttonPin);
// compare the buttonState to its previous state
if (buttonState != lastButtonState) {
// if the state has changed, increment the counter
if (buttonState == HIGH) {
// if the current state is HIGH then the button
// wend from off to on:
buttonPushCounter++;
Serial.println("on");
Serial.print("number of button pushes: ");
Serial.println(buttonPushCounter);
} else {
// if the current state is LOW then the button
// wend from on to off:
Serial.println("off");
}
}
}
}}
}
return !Stop; // return the state of the timer
}
void SetTimer(unsigned int hours, unsigned int minutes, unsigned int seconds)
{
// This handles invalid time overflow ie 1(H), 0(M), 120(S) -> 1, 2, 0
unsigned int _S = (seconds / 60), _M = (minutes / 60);
if(_S) minutes += _S;
if(_M) hours += _M;
Clock = (hours * 3600) + (minutes * 60) + (seconds % 60);
R_clock = Clock;
Stop = false;
}
void SetTimer(unsigned int seconds)
{
// StartTimer(seconds / 3600, (seconds / 3600) / 60, seconds % 60);
Clock = seconds;
R_clock = Clock;
Stop = false;
}
int ShowSeconds()
{
return Clock % 60;
}
boolean TimeHasChanged()
{
return timeFlag;
}

Answer 1

The code written is basically for edge state detection. That was the primary reason why the button state was not being read in other time intervals.