A tip.; at the beginning of the most games the wave cards will be shown first before the bottom cards are being laid. Continue click the wave card when the bottom cards r getting ready for u to use. Because if u get lucky the last card in the bottom linedup cards might match the wave card and therefor thrown straight away by ur advanced tapping on the wave card preventing ur precious limited amount of the bottom cards be eaten by the wave card... hope that made sense....

I think I have figured it out. After some time the game will notify that u can change ur portraits. And there are many different portraits masks which each have discriptions of what they can do. U will find one mask that can be used to catch Poi (u will have to complete n win the level Poi's currently stays) when u succeed u can change to other powerful masks/portraits that cab helps u with lots of other things (read the descriptions)
All the best