mines.sylv.cat (formerly minesweeper.png) is a recreation of minesweeper on Discord.
In order to start a game, you must first send the url "https://mines.sylv.cat/new" in any Discord channel.
Then, it will instruct you to send a message. That message will replace the parameters in the URL with your custom parameters. For example, if you want to play on an 8x8 map with 10 mines, you would have to send something like this:
s/new/embed?init=i+love+yonkagor&w=8&h=8&m=10
Once you send the setup message, the embed will update itself with the game link. All you have to do is copy that link and paste it in a Discord channel.
This game has two commands. In order to use them, you must send them as messages.