Upgrade Sub

Max out FUEL and Recharge. Dive up and down in a sweeping motion while holding SPACE BAR to hit a majority of enemies. Max out Mobility and Luck next. Then upgrade as you see fit. This tactic rakes in the cash. Remember you can shoot objects in the sky for big bonuses.

Note: I now beat the game. I would also like to mention it's exceptionally annoying you are stuck to the side of the screen when you are trying to collect bonuses in a 2 dimensional space and you are stuck to 1 dimension.

good start, movement and action are a little jittery, though... need a reason to play beyond just upgrades and distance

Tip : You can refill your Oxygen bar by going out of water :)

It says "Misson Complete" at the end of the game, i think you should write it right ^^

I played through most of this game and it's quite awful for these reasons:

1. At maximum upgrades, I'm still having extreme difficulty. The upgrades do very little; they should be costly but at maximum they should give you a good advantage.

2. The missiles are too small, they barely hit anything. This wouldn't be so frustrating except you HAVE to hit the enemies before you hit them.

3. Why ? Because about half the missiles are physically impossible to dodge, but unfortunately you can't hit the enemies fast enough. It's not physically possible.

4. Your oxygen and fuel bars are so low that the multiple hits you are guaranteed will make you lose. Only an extreme champion of side scrolling shooters would be able to prosper.

5. I do like the enemy design, but there are way too many enemies onscreen after a certain point.

6. The speed bonus is absolutely useless. It just flings you into danger and takes away the fuel and oxygen bonuses which you desperately need.