How to Use Google Drive to Store High Scores for Twine Games

Screen Shot 2014-05-31 at 6.18.51 PMThe first thing that you will obviously need is a Twine game that stores the player’s points as a variable. To do this, write a bit of code like this in the Start passage: <<set $points = 100>>. Any time that you need to change the player’s points during the game, use some code like this: <<set $points = $points + 5>> or this: <<set $points = $points – 7>> As a side note, it’s possible to use shorthand like this <<set $points += 5>> to add or subtract points, but I prefer to teach the former code to my elementary and middle school students because I believe that <<set $points = $points + 5>> is easier to comprehend.

Your Twine game will also need to store the player’s name. An easy way to ask the player their name is to use this code:

<<set $name = prompt("What’s your name?")>>

Screen Shot 2014-06-01 at 7.16.59 PMCreate a Google Form with two questions, each with Text input fields. Make the first question “Name: ” and “Score: ” for the second question. Don’t worry. We’re not just going to ask the player to type in their score, we’re going to use a script to enter their score automatically. Uncheck “Show link to submit another response” on the Confirmation Page.

Click “View live form” to see your form. Right-click and choose “View page source.” Copy all of the HTML code from…
Screen Shot 2014-05-31 at 6.02.18 PMb
to…
Screen Shot 2014-05-31 at 6.02.18 PM
Screen Shot 2014-06-01 at 7.12.09 PMb
…and paste all of this into the last passage of your Twine game.

Type <html> before the HTML code that you just pasted and type </html> after it.

Create a new Script passage, then copy and paste the following code:

/*Places the variables (given as parameters) into the Google Forms
text input field.*/
macros['googleForms'] =
{
handler: function (place, macroName, params, parser)
{
/*Enter the ID of the first Google Forms text input field here.*/
a = place.querySelector("#entry_111111111");
a.value = eval(Wikifier.parse(params[0]));
/*Enter the ID of the second Google Forms text input field here.*/
b = place.querySelector("#entry_222222222");
b.value = eval(Wikifier.parse(params[1]));
}
};

In the Script, replace entry_111111111 with the ID of your first Google Forms text input field and replace entry_222222222 with the ID of your second text input field. Make sure that you leave the # before the IDs.

After </html> type <<googleForms $name $points>>. Replace $name with whatever variable you used to store the player’s name and replace $points with whatever variable you used to store the player’s score.

You can test it out at this point by playing your Twine game. When you get to the end of your game, you should see something like this:

Screen Shot 2014-05-31 at 5.49.31 PM

Once you’ve tested it and it’s working, we’re going change the HTML code so that all of this business is hidden. Change <input type=”text” to <input type=”hidden” for both of the text input boxes. Change value=”Submit” to value=”High Scores” or something like that. Delete the following text from the HTML code: Name:, This is a required question, Score:, This is a required question, Never submit passwords through Google Forms.

Next we’re going to set up the Google Spreadsheet that will store the high scores. A spreadsheet should have been automatically created when you made the Google Form. If you named your form “Twine Game High Scores,” then the spreadsheet will be named “Twine Game High Scores (Responses).” Open it and insert a new sheet.

Add this code to cell A1 of the new sheet: =SORT(‘Form Responses’!B:C,2,0). If your game works so that low scores are better than high scores, then you would use this formula instead: =SORT(‘Form Responses’!B:C,2,1).

At the bottom-left, you will see “Form Responses” and “Sheet 2.” Drag and drop them so that “Sheet 2” comes before “Form Responses.”

Click the Share button at the top-right. Copy the “Link to share” and then share the file so that anyone with the link can view (but not edit).

Open your Google Form. Type “Your score has been saved. Click here to view the high scores.” in the box for the Confirmation Page and then paste the “Link to share.”

Here is a demo: www.ohiofi.com/twinehighscoredemo.html

I used this in my newest Twine game, Sundown.
You can check out Sundown here: http://www.ohiofi.com/sundown

mario

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