No idea. The game really isn't a "free explore" game, with all the invisible walls and "you done bad" teleports. I searched for the "secret place" for as long as the game took me (about 20 minutes) and I didn't find anywhere interesting.
Sorry for the forced reset. Hint for the secret place : it's before the big open room.
I got so lost for about 5 minutes, but I found it! Love the place, though it wasn't as hard to get to the end as I thought it might be originally.
Fantastic work NuSan. A+ game!