For the 
Currently, I’ve implemented all main features of the game: login, matchmaking, the game itself, rewards for winning games, and even a chat system! Below, you can see current working pictures of the features that have been implemented. These will be embellished later, of course.
Login feature. Don’t worry about the posting keys there: these accounts are on a Steem testnet, so nothing of value is lost if people decide to play with them. (Thanks to 
Chat feature. You can talk with other players, all communication being done on the Steem blockchain. (Wouldn’t Steem Chat be a great idea?)
Matchmaking feature. You can search for other people to play with on the blockchain, and it will automatically match you with the first person it finds!
Game itself. Notice the only card available right now, the Undead Zombies from Steem Monsters, in the play field, and the turn timer at the bottom.
You can already move monsters around! Just click one you own, select where to move/attack, and it will do just that.
At the end of the game, when you kill all of an enemy’s monsters, or the turn timer is up, the winning player receives 1 card (which is represented by a number at the moment). Pressing the "Close Game" button returns you to the lobby, which has the chat and matchmaking features.
Coming up, I’m going to add a card for every single monster available, so that there’s a wider variety of cards, so players take a while until they unlock all cards: unlike Steem Monsters, cards can be unlocked just by playing, with no monetary investment! After that, I’m going to differentiate the owners of the monsters better, as currently it’s hard to distinguish who owns what.
Interested in playing? I will make another post when it’s released, make sure to follow me! If you have any ideas, suggestions, or questions, feel free to comment!