Time Pilot cheats and cheat codes for PC

Here's one way (although a boring one) to get a great Time Pilot score: 

1. Finish the first stage as soon as possible

2. On the second stage, don't shoot anything!! 
Eventually, parachutes will start to appear. 
Collect the parachutes while avoiding the planes. 
Each parachute (after #4) will give you 5,000 points. 
It's possible to roll the machine over (999,999+ points) 
while remaining on level 2 using this strategy.

NOte: While using this cheat you can also shoot the 1500 point bombers 
without causing the time bar to be shortened.