Yup, what others had said, very addictive. I had a blast playing it, super fun, super engaging. The upgrade process was great, though in the end I believe that all that matters was getting X-X dice with crits for constant double value.
I like that you included "fast" mode, and for a bit of criticism from my side: the animation of the little dude getting all the way back after a lost fight gets tedious after a while and I'm personally not a fan of this "entanglement" mechanic.