This technique is not a bad idea, but since it involves missing sleep than I would not suggest doing it too often. It looks like the lack of sleep beforehand helped you to both fall asleep faster and to start REM sleep faster. Since your mind craves REM sleep, it gets more when you get less sleep (and also if you get more sleep).
I don't think your game is the cause of the WILD, but this "tetris effect" could be useful. When you go to sleep after playing a new game that you havn't played before a lot, you can try to form associations between this game and being aware of dreaming. This should act as a safty net if you don't end up WILDing. If it is a similar case, then you will probably end up WILDing because of the HI.
How can you put this together? First, go to sleep early and at the same time for a few days, and on the last day wake up early enough so that you are tired. Next pick out a new game to play (or anything else new and exiting that you can do for several hours), and get all worked up about it. If you can use figuritive language that mentions dreams to describe it (e.g. This is the ___ of my dreams! ; I must be dreaming!). Then play your game for several hours untill it's really late and your body makes you fall asleep. Lastly fall asleep while telling yourself that the next time you will play that game it will be a dream.