How to design your Free Lite App to increase sale conversion on Paid Full App ?
I have developed a picture puzzle game , Now i wanted to release them up as two version one is Free Lite App (to increase exposure) and Paid Full App (to increase revenue). So i was basically wondering what kind of features should i restrict or add in the Free Lite App so that users are inclined towards purchasing the Paid Full App.
1) Restrict number of levels - Should i restrict the number of levels in Lite, i have about 100 levels in Full , should i restrict to 30 (30%) ?
2) I have an option of IAP of additional 50 levels, should i restrict in Lite or add them ?
3) iAds and Admob in Free Lite. Will annoying ads drive sales to full ?
4) I have 3 difficulty levels in Full Paid which is Easy, Medium, Hard ? Should i just give only Easy level on Free Lite ?
5) Game Center - Should i restrict in Lite ?
6) Should i restrict the amount of time before they resolve the puzzle in a level in Free Lite and no restriction in Full ?
So basically i wanted to know at what point the gamers decide to buy the full app without really pissing them off

, the key things to consider, any suggestions / recommendations and your experiences are appreciated ,