That's around 280 C. Look at the advert displayed on that restaurant. You will know how much you will need to buy before their timer runs out.
Do you see little drop down arrow near you profile name? Click on it and go to 'My Library' option. You should see any games you have bought with this account. If that's not the case, itch.io should have sent you an email from where you can download it. If you didn't get an email please contact 'support@itch.io'.