Concept : You are one of stellar mages that travel across the star to find the fragments of eternity. In the galaxy that only have ten fragments exist. Each fragment hold different power inside. The game will come to and end when one of stellar mages can collect all of the ten fragments.
Why Stellar ? : When I come to the world of cyptocurrency and found stellar. I feel fall in love with it and I'm really excited to join the build challenge (Although I'm just a newbie in this technology). I ask myself what should I do and I found that. I want to create something that attractive more people to stellar. Moreover they must capable to use stellar currency (XLM) to buy something. Because I myself want to feel that feeling.
How to implement : Let start with website portal that is the first entrance to become stellar mage. It will require email, password. After that it will generate account from server test. This account must automatically allow trust on some assets that use in game. Assets like "Magic". Magic will use for any in game activity such as "Burning", "Healing", "Stealing", "Protect", "Revive" or etc. One Magic price maybe 1000 stroops. You can buy magic on some star that you visited (This is Game's Account that hold many type of asset for sale). If the "Magic" is some kind of asset. It mean that you can transfer to any account that have trust line for this asset. But if that account want to use the "Magic" they must become one of stellar mage via website portal. Because when you want to use magic. You must transfer this asset to Game Account to make any effect depend on that asset. After someone collect all of ten fragments the game will reset again. I think someone who win the game should get the specific item for the next round or gain the money that collect from sale magic.
Some Explanation on Magic
Burning : Burning target. (reduce hitpoint of target. Target will die if hitpoint reach 0)
Healing : Healing yourself, friend or enemy (if you really kind). (add more hitpoint to target)
Stealing : Steal something from target. (you cannot steal magic but fragment and the other thing can steal)
Protect : Cover the target with the barrier. (I still not sure what it mean ?
Revive : Bring some corpse that you found to alive. (Someone that hitpoint reach 0)
Finally I hope I can finished more thing before 15 Mar and Sorry for my poor english. Moreover I want to say thank you to @tyvdh the person who create Colorglyph. I read your Colorglyph's article on Medium more than one time to get the concept of this. ?