Ok, multiple issues:
1. On the Thank You slide in scene 8 there was a trigger with the text "Send the data to the Google Apps Script Web App..." - that's not ours and it contained a typo which broke all javascript in the project. So even if everything else was fine, javascript still wouldn't work because of this.
2. The javascript trigger on slide 3 that was sending the data was set to "when timeline ends" with the timeline being only 5 seconds long. So your issue was that you weren't typing fast enough to have any data to send at the 5 second mark. I added a button and linked the trigger to that button instead to demonstrate that the trigger works when used properly.
3. Each data point was saving to a new row because the project was missing a variable stencilsheetstoken. When you save your widget, you can see the complete list of triggers and explanations of how to set up the widget. I added this variable, it's fine now.
4. There are two Sheets initialization triggers on the master. While the second one doesn't break anything, it may cause confusion later if you try to update the triggers. So I deleted the second one.
Here's your update file:
https://www.dropbox.com/s/5tbjjgn5qrodu4k/African%20Climate%20Change.story?dl=0