Dev here. I never expected it to do well or sell at all. The way I looked at it is like this "I'll roll the dice, probably won't work out but I'll give it a shot"

I think in general you've just got to get it wrong. If you look at other games by EEG, you'll see "RollRover" - a terrible terrible little puzzle game that didnt even sell 50 copies, Why do we fall Mr Wayne?

Having said that, the biggest part was luck. right place/time etc