NOT FREE You can only play a few levels before it makes you buy the game. This is not a free game, demo at best...
Excellent, but in-app purchase This game is excellent, but ( generally speaking) the in-app purchasing is killing me (I own 2 android phones).
Good But I have to pay to play next level
Doesnt keep my save and wants me to buy full
Good game But should be completely free
Hard I die on lv 1!
The aliens are here... and they didn't come in peace. Can you save the Earth?