- There are not many levels in the game
- Hard to finish the puzzle / user gets bored before finishing the puzzle
- UI is not great. You'll need a decent UI when developing games
- No regular updates. Important way to increase downloads is to push regular updates. With an update, app appears in the "Just in" section of the android market and gains visibility
And not to mention with such less downloads, the ad revenue is pretty bad ($1.52 so far). Even though the total number of impressions that are being served on both the apps together is between 1k-2k per day, there are only 1-3 clicks per week. My best guess is that this has something to do with the way I place ads in my apps. Almost all the free apps (games) that I'd seen till date place ads over the game distracting users. I hate that. So, during game play, I'm diving the screen into two parts, one that displays the game and other displays ad impressions. This won't draw the attention of players and I think is the main reason for the low CTR