No, it's not true at all, according to my logtastic logs.
Puppygames is going to diversify but I myself won't be doing the diversification. I am in the process of figuring out how to turn Puppygames into the fabled Indie Co-op and relinquishing direct control of it. We will be diversifying into Killer Puppy, Happy Puppy, and Clever Puppy; Killer Puppy's the shooters, and I'll be sticking with the genre for a while because I like it. One thing we aren't going to cater for specifically is portals though. There will be no portal games from Puppygames.