They're overpriced and mass-produced with bugs, while the walkthroughs even cost extra. I highly doubt his games are worth the price you have to pay, but that's just me. However, others have complained on other pages. I tried his first, free game My Soldier (or whatever the name is) and didn't like it. If you enjoy coolpeng's games for the money, then good for you, although considering what you wrote in the op, you don't seeme happy. 

(I made an extensive collection called Bara/Yaoi/BL games & visual novels if you're interested)