Whole game is friendly for short entries. You can log in, collect a tribute, do a couple of battles, chat a little, log off and repeat. Only TH is different, one map is, lets say 20 minutes playing.
With save option it could fit the game philosophy.
During TH event week best value would be hit 60 moves, then end and 
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Like this post if you want to see that save/end option, comment if you wish.