To create a Level up certificate, we would normally:
1. Buy deco from General Store, place deco on farm. replace code, store in inventory and refresh browser.
2. Just imagine if you want to create 100 certificates.
Another way is to:
1. Change code, then craft custard in kitchen.
2. One thing I dont like about this method is, I have to search for something like CUSTARD or CERTIFICATE or LEVEL UP in the kitchen.
3. And the kitchen search bar will not function.
4. If you manage to find it, then craft as much custard as you want. Each custard represent 1 certificate
5. refresh browser.
and the fastest and simplest method is to:
1. replace code: e_rare_crop_blackberry -----> e_certificate_level_up
2. Plant the 2 minute blackberry, fertilize and speed-grow if you are not patient enough
3. Harvest and you will get the same number of certificates as you would normally get when harvesting the crop
4. refresh browser.