Jesus couldn't beat the third level of Choplifter on SMS if God himself hacked it for him. It's F'n IMPOSSIBLE. 500 billion (rough estimate) projectiles firing at you the instant you get near the gravity-defying cave with people shooting at you from a dimension that exists outside human understanding and thus bypasses 360 degrees.
EDIT: I cheated in an emulator and finally beat the third stage at one point. The reward for your god-like effort is to start the game again at level 1. They could've included a message afterwards condemning every race and orientation in existence and no one would know because emulation wasn't in existence. I know I would have.