I did a few runs, but I eventually want to aim for a 1CC run.

It is technically a pretty impressive shmup for the Master System that was released initially in 1988, considering how crowded the screen can get with both enemies and bullets. 

The ammo system makes the player be a bit more considerate with their approach, but it's never difficult to have their stocks replenished; in fact, I sincerely believe that Weapon 3 pretty much breaks the difficulty. I can absolutely understand the frustration of getting hit and losing all of your power ups, which can result in a bumpy road to recover to your previous power level.

I also really liked the implementation of a dynamic difficulty, meaning that no playthrough will ever feel the same.