awesome game, my internets been down for a day or so but i managed to download this before it did.
i think for 10$ its a great deal:
You have adventure mode that gets progressively harder as you learn the basics
then theirs 20 mini games, id say maybe two are just harder version of themselves
then 18 puzzles which get pretty hard. Then you have survival mode which you play like adventure only in waves of 5 or 7, changing your "deck" in between (they show you what types of zombies you will face.
In adventure their seems to be 6 places
Front Yard ( day and night )
Back yard (2 water rows, day and night)
Roof (day and night)
first you start off in the front yard in which you are given a sunflower which makes "sun" which is basically the currency to buy new plants for defense, during the day you can also pick up suns icons that fall from the sky making it a bit easier then playing at night.
At night you cant (at first) rely on sunflowers so you use these mushrooms that make smaller bits of sun at first so building is a bit harder. Also you can use some night specific plants that are weak but cost nothing. Also to make night harder their seems to be random gravestones that take up a planting spot in the ground. During the final wave, if you haven't got rid of these graves you get bonus zombies coming at you, which is bad depending on where they are.
For most of the adventure mode you cant use night plants during the day but you do get a "coffee bean" that will wake then up for use later on, so its at a 75 more sun cost.
eventually the zombies tire of assaulting your front yard so they move to the back which has a pool for the 2 middle rows (every level has 5 rows) which introduces water plants.
You can plant regular plants on the water if you lay down a lily pad first for 25 sun. (which do nothing on their own), some zombies are water specific and fast.
Lastly the roof which is very much the hardest. you are given 4 columns of planting pots which are basically like lily pads for land plants. So if a zombies eats your plants you have to replace the pot before the plant. And all 5 rows are pots unlike the back yard where only two rows have this dynamic.
Anyway the game is really fun, highly suggest to anyone who even passingly enjoys tower(lawn) defense type games
anyway heres a screenie of all the different plant types from the almanac you find in game which lists plant types and zombie types (im missing only two, one is special and doesnt take up a slot here i think)

oh also theirs a shop to buy more plant slots and extra stuff like a zen garden to grow plants for profit, this game has soo much content