Hey Kalinka I have done a bit of research on this in the past for an app idea I had but have yet to fully immerse into it
There is one blockchain that has some example games on it if you want to check it out, they have a tutorial where you can make a blockchain game https://battles.eos.io/
Its not dogecoin but its built for creating apps and games using blockchain basically a "free, open-source blockchain software protocol" :)
Hope this helps!