I had a chance to play a few more of the Humble Mobile II games.
Punch Quest is great fun and I'm loving it. Fast-paced, mindless fun. Karateka Classic is just horrible. Maybe it was fun in 1984, but it isn't fun now especially with the incredibly sluggish responses to inputs. God of Blades is alright. It's challenge ramps up pretty good but it is very repetitive. It also runs pretty poorly on my Nexus 10 and I get severe framerate drops on occasion. I found the touch controls in Ravensword: Shadowlands to be absolutely horrible and couldn't stomach any more than 5 minutes of the game.