Take your time and don't be lazy. If you make a map in 2 minutes, I mean if you don't change the default map and just add some monsters and coins, don't expect to earn a high rate.
This game is very cool but too easy : when you know how it works, you'll never fail and clear any level in less than 1 minute. But it still a great game because there is no luck. Maybe the concept could be integrated in a future harder logic game ? Anyways thanks for the free 15 points.
For those who didn't know : bamboos and street light count as combo as well when you break them. When the game goes faster, it's maybe harder to stay alive but also easier to make combos. It's easier to get the hard badge after clearing some missions. After breaking 5 ou 6 gates (don't know exactly), the game don't go faster. Hope this comment will help someone.