I've played around in Ancient Egypt for a while and I've noticed all these extra paths hidden behind key gates. Unfortunately, I don't have enough keys to open all the gates. Without purchasing anything, what's the fastest way to mine more Egypt keys?
The keys drop randomly so there isn't a fastest way other than keep playing levels. You may optimize your gameplay by trying to get all the stars, and once you've got them all you'll even have some leftover keys.