3...c5 looks wierd after ...g6, if White takes the pawn how does Black take it back ? with the bishop after ...e6 ?
5...exd5 ? is the 'decisive mistake', as after 6.e4 ! 6..Ne5 runs into the game, the knight has no good square and 6...d4 ? 7.exf6 cxd4 8.Qe2+ (oops)
I just happen to study the King's Indian Defense a little bit before this game, but not this variation. I noticed immediately when my opponent didn't prevent me from playing e5! and I jumped on it, I missed punishing to the MAXIMUM extent with Bd3, but I was happy with my continuation. ---Feel free to comment in any way on the game, criticisms, tips or anything else, thanks!