It's a stonkler, there's no doubt - you should be grateful to alive in a world where games like Silkworm cost only £2.99 (if you have the patience to wait for them to turn up on budget).
A horizontally-scrolling shoot-'em-up par excellence, Silkworm takes place in a world where nuclear weapons have been banned - which means that the conventional ones have become bigger, better and nastier. But this is not enough to make the commanders of the One Continent Alliance happy - they want an excuse to try out their toys (whoops, bit of politics there!)
Piloting an advanced helicopter (or ground attack vehicle, or both on two-player mode) your task is to smash the warmongers once and for all.
There's a time limit to complete each level, and time remaining at the end of a level is converted into Hero Points. Your chopper (fnar!) fires downwards and forwards: landmines, when shot, release a cloud of plasma. Fly into it, and it acts as a shield for a short period. If there are two clouds on screen, collect the first and shoot the second to create a smartbomb effect - very logical and realistic. I'm sure.
You'll enjoy shooting bits off the gooseneck helicopters, which fly onto the screen in sections and assemble themselves: and even more laughs are to be had with the giant helicopters and tanks which are the true end-of-level nasties.
It has to be said that Silkworm's graphics are more exciting than its gameplay, but if you like the things you're blasting to look pretty, at budget price this is one you really shouldn't miss.
Wipe down your giant chopper (oo-er) and prepare for a blast which will really take it out of you. A classic of its time!