First of all this is a review not an ad so only check out my referral link if you care to try the game.
Secondly, enjoy because this is one of the most promising games there is in the crypto-space and I have been playing for years.
With nearly 250,000 users registered since 24, Nov 2017 (CMG), the game has been thriving in a unique space. Here I'll explore the different features that make this game so rewarding!

This is the homepage the mining operation room of your game their is plenty more to do but using crystals to power your mining rigs is certainly a great use of idle time. They currently use real satoshi, litoshi, etc. but will be looking to make a much more viable change for the sustainability of the game. They are switching to placeholder coins that will hold their USD value compared to the actual crypto price. They frankly should have done this a while ago but will be instrumental in the game's long term success.

This is the cryptoworld... Here is where you can message, attack, spy, explore and earn rewards and items for yourself. You send drones on misssions to retrieve the rewards shown by their icon. Missions cost energy which increases with each level threshold. You also earn experience for successful completion of your missions.

This is the Crypto Mining Card Game. This is important for spying on and attacking other real world players. Doing so will earn you Victory Points on top of rewards and experience. Victory Points are used to compete in the standings of the Crypto Mining Game Season. Below shows potential rewards for top place finishers and the seasons resets each month(?).

Not personally where I spend much of my focus. I am more focused on the mining and jobs aspect as I find it is easier to accumulate currency. Jobs are managed with skill points and are an alternative to missions and can take up more background running time while you're away.
CMG has much more to offer including surveys, minigames and even an app that lets you acquire CryptoCoinz, used for upgrading CryptoWar cards. They even made their own anti-bot minigame to stop cheaters! This game has been so vastly expanded in a few short years that I can't wait to see what becomes of it in the future!
Here is my referral link if you want to check the game out. It is completely free but you can pay a small fee to get 1000 hashpower to start mining Ethereum, Bitcoin Cash, and Dash which are blocked before that point.
Here you can follow their updates and information