add some levels..some kind of story maybe, upgrades and different types of enemies...it would give us more variety to play from and make the game more interesting to play
this is really a good game and i have completed the first one thrice at least , you should have kept the flying concepts same as to follow the one bird, and the running always gets the bird killed its had to get the right timming...+ if you agree
make next tima a costumize tank mode too where you will be able to chose the color you want and add more tank designs it will be awesome if every one will have a differnet tank