Poor.
Almost no depth whatsoever. For myself, the main draw of roguelikes is the depth of character customization. At the very least, this means some equipment customization, maybe picking a race, but most of all, I want to be able to shape my character as they level up. This game offers so little in the way of RPG elements, I was still waiting for the game to really begin after I had beaten it. Rarely do I give poor reviews, but having just finished Cavern with a bad taste in my mouth, and especially when a game like Cardinal Quest 2 (just to name one from the top of my head) offers so much more and is free, I felt the need to warn prospective players. Do not pay for this, look elsewhere.
Blū about
Cavern