So I recently downloaded this neat game called Tank Hero. Don't be fooled by the amateurish name, this game is the bomb!
You get to choose the Campaign Mode or the Survivial Mode.
The Campaign Mode just throws your into level progression with single type of ammo.
While the Survival Mode, gets interesting. You get to purchase Different types of Ammo, like the Spread Cannon, which fires 3 shells at once which spreads out as it moves away.
There are 2 types of Camera display - Follow and Fixed, and 4 types of Control, my personal favorite is the Swipe and Tap.
I really enjoyed this game, the 3D graphics and sound effects are awesome. I must say though, it gets pretty tough in the survival mode as you go deeper into the levels.
If you haven't tried it, go have a whirl! Its in the Market and its free! :)