It's still not inside the game, the description on the license is just a hint at future content ;) . Btw, congrats on finishing the Slime Forest! Hope you had a good time playing it!
I am going to figure this out, it is not the case of failure = mob because one of the versions I failed with broken chest result, and no mob spawned. Now my lock pick is 47, and I open chests with a roll of 2, I hope this is not the case. I was thinking "putting a little light" on the subject was the answer but I have been killing all morning with all that equipment on.