Playing Tips:
Buying special weapons can make defeating the bosses easier,
learn the patterns and always try to have big wings and twin bombs.
Tree stump boss (round 1)
Shoot it in the mouth when it's open, and don't get too close, or the
leaf-bullets will boomerang on you. Special weapon's aren't especially
helpfull on this boss.
Round thing with orbiting "bells" (round 2)
To defeat it, you've got to shoot the inner ring of spheres away.
I reccomend using the 7-way shot if possible, the heavy bomb can help too.
Watch out for the falling bullets and seek an opening, or else you're dead.
Often there's a large gap in the bullets directly under the boss, so try
getting under it if there's no where else to hide.
Laser face thing (round 3)
This boss is a breeze if you stay above it. Quickly bomb away
the top gun, and you'll have a place to hide where you can bomb away peacefully.
The Heavy bomb, 7-way shot, or wide beam can be helpfull too. To
avoid getting shot, you can also fly behind this boss if you choose.
The boss with the wavy arms (round 4)
Not much strategy, just shoot the arm segments untill they turn orange,
and avoid the bullets. The 7-way shot, or smart-bombs can be usefull
here (3 smart bombs will kill this boss).
Snowmen (round 5)
The best way to deal with this boss is to take out the first row as
quickly as possible. Each row must be cleared before you can harm
the next, so the 7-way shot is the best choice here. Exellent bullet
dodging skills are necessary if you can't afford any special weapons.
I've also seen a special technique used on this boss: Destroy all the
snowmen in the first row, then just the top and bottom snowmen in the second
row. From there, if you can dodge the bullets for about a minute,
it will stop shooting at you, making it a sitting duck.
Tornado (round 6)
When this boss shows up, quickly fly to the right side of the screen
and start firing. Trying not to get hit by the rows of swirls is
your top priority, and try to shoot it in the eye when you go around it.
The heavy bomb can be of some help, but it's not really necessary.
Big square face (round7)
You NEED at least big wings, but the normal engine is better.
When the face seperates, move away, because it's coming after you.
And when it's in one piece, blast away. Any weapon should work well
against this boss, but buying a fire bomb or heavy bomb couldn't hurt.
Final boss (round 8)
Your standard double shot should work fine for the first 4 spiders,
but for the last 2, you NEED heavy bombs, so after the 4th spider, move
to the upper-left corner of the screen, and drop the bomb when it gets
near.