Len’en Ten’eisenki: Brilliant Pagoda or Haze Castle

The fourth entry in the Len’en series,
“Brilliant pagoda or haze castle”,
is a bullet hell shoot-em-up with lots of random elements.
Purchasing upgrades and skills allows for slow but steady growth,
so even those who are bad at bullet hells should be able to clear it.
Should be… yeah… (thousand-yard stare)