Just pushed new update of the game, about 3,000 extra words, including three new spells (Invisibility, Friendship and Silent Step, first two for wizard and the third for cleric). I am planning to code a few more spells in the coming days. Also, there are two new magic objects, a potion of invisibility and a scroll of Friendship. Finally, as I said earlier, I implemented some cheat codes.
To test it all I made a small youtube video, while I was checking that it all worked correctly.