Your Derp can be fed five different kinds of food, but the one food type you should avoid would be the spotted eggs. These eggs will make your Derp extremely sick, and you should only feed him a spotted egg if that’s the only food you have left, and are trying to take him through that final level before he kicks the bucket.
If the spotted eggs are the food to avoid, the food not to avoid is the cake. While a piece of cake is going to cost you a rather premium 40 coins, that will allow you to restore your Derp’s heart and energy meters just like that.
As is the case in any other mobile game that involves currency, you’ll want to make good use of your coins. This will allow you to keep your Derp healthy and buy him what he needs. And as far as that’s concerned, you’ll want to buy him stuff right away once you sense that he needs something. For example, putting off your bug spray purchase will make Derp even sicker. And not buying a bucket of water when he’s on fire will only have him burning to death faster.
Eventually, your Derp is going to die, and when that happens, you can spend 20 diamonds to bring him back to life. Diamonds are the game’s premium currency and are usually purchased through real money. However, you can also watch ad videos in order to get more diamonds without having to pay – there doesn’t appear to be a limit to the number of ad videos you can watch.
Every time your Derp dies, there is a bar that fills up with each death. Fill that bar up all the way, and you’ll unlock a larger bank, thus allowing you to begin a new game with more coins.
Every few levels or so, you’ll unlock new forms for your Derp. And the only way to do that, to evolve your Derp from a baby through the different stages of life, is to gain more experience.