The result of strengthening the central jet.

1:Detach wheel
2:Detach a board with a lot of missiles attached
3:Detach cannon and stabilizers
4:Detach booster (self-destruction after 1 sec)
5:Detach rocket pod
6:Parachute
7:Emergency escape

Supplement of 3: When disconnecting the rear engine, there is a high probability of catching. Cause engine activate 8 group.
1.OFF 8
2.Throttle 0%
3.ON?OFF 8 (Rear engine output fixed at 0)
4.throttle 100%
5. ON 3
If you do it in this order you can safely disconnect.

“guru guru”(Japanese onomatopoeia representing rotation) is Cannon on vertical stabilizer.
The most common ground enemy of Bullet Hell.

English is very very difficult...