Ok now I just need one last thing and I am finally done how can i count the coins as i collect them. I want it to show the amount of coins I collected after i lose the game at the end up right corner is that possible?

Is that what your counter field in your world class is for? -- to count coins collected? If so, should work to keep its value updated.

No it was for counting the score for when the bird goes inside a pipe. I want a new counter for every time the bird collects the coin that appear at the end when it displays game over

Then, add a field for it. Call it "int coinsCollected:".