Reconsider your business
The game is nice, the graphics is adeguate, but I suggest you to reconsider your business choices: you’re giving the 1st (of 4) level for free, then 3 of 4 levels have to be purchased. That means you’re having ADs income from 25% of the potential 100% (and, at each biome’s start, an AD is something one wants, for its benefits). That also means, after 1st level mostly done, great part of your potential audience leaves the game (as it becomes boring, not wanting to buy it): it means great part (80/90%?) of your audience don’t contribute giving money. If you leave all 4 level playable, 100% of the gamers will contribute by paying via ADs (and the ones who wanted buying will buy anyway), also, even more possibilities to sell, as more are playing (at least from lev.1 to lev.3). I work in a bank’s customer service so don’t take my advice that lightly. ;)
