Survival Level

So, I finally beat the Mecha Robot after many many tries , ( all without cheats or hacks btw ) This then opens up a secret option on the main menu which is the Survival rounds. Does anyone know how many there are ? Im currently on the 4th screen of Survival.
The only thing that is a shame, is that once youre dead in Survival, you get one more life, then you have to start from the 1st screen again.
A really cool thing they could add if they ever bring out a sequel, would be a way of powering up your health .
Amazing fun game, and probably the best for the Itouch out there.

nikovich about OMG Pirates!