Hello,
I like to introduce my hobby project - CryptoCultures. Its a simple strategy game, where you own a piece of land, build your tribe and fight each other on a big map. Each tribe is an ERC721 Token and the ingame currency gold is an ERC20 Token. It is no ponzi schema, but there is a small fee to prevent spaming the map.
You can try the open beta here (it is already on mainnet):
https://crypto-cultures.github.io/You need MetaMask or any other Dapp browser
The first culture are egypts, but there will be more to come
If you have any suggestions, question, ... feel free to comment