When you start the game, the bot picks up a random word (via random-word-api) and gives you extra lives to guess the word by typing letters.

Count of extra lives (❤️ emojis) = count of unique letters in the hidden word

When you type a letter, if the letter is contained in the word, it will be shown up. Elsewise, you will lose one life.

if you need a hint, /letter will show up random letter for you (costs one life)

If the word is really hard to guess - you can use /help command (costs one life) to get the meaning of the word.
(I used oxford dictionary api to get definitions)

Screenshot from game: