I'm shocked to hear DFK's Apple port didn't include an Easy (Novice) difficulty; even the 360 port has one.
Cave games (and Arcade games in general) are meant to be extremely hard so that you spend more quarters, but fair enough that you get hooked as you see a 1cc/1-all/2-all as a possibility. As I mentioned before, the idea of an Easy (Novice) difficulty is really a relatively new idea even for console/mobile ports of the games. EDIT: I'm stupid.Games like DFK and Mushihimesama Futari Black Label are called "easy" not because they're on the level of Touhou Easy, but because compared to other arcade shmups they are much, much easier and/or more forgiving of mistakes. For instance, if you want truly fast bullets play a Raiden game or any game by Psikyo.
In an effort to help, unless I'm mistaken, typically in Resurrection when there are fast bullets most of the time they're aimed and are meant to be streamed. The rest are read-and-dodge and can be bombed; usually these occur on boss fights. For instance, DFK stage 3's boss has fast bullets in her first form that are the latter read/dodge type, but are slow enough to see the gaps. Her 2nd form's opening attack seems hard until you realize you can pretty much stream all of the pink bullets no matter how she moves. The third form is again read/dodge but is so fast that I often eat at least 1 auto-bomb. It takes practice and experimentation but eventually you see what they were thinking.
Another example of fast bullets that aren't bad is the beginning of stage 2. When the big ships arrive, they seem tough; lots of fast circle bullets with another shot mixed in. It's a trick; simply stand still until the bullets almost hit you and nudge
slightly to the side; you will find out everything is aimed and will basically "graze" the entire attack. The main problem is that a tank/helicopter may snipe you with their tiny pink bullets if you're not careful (I hate when that happens).
You may already know all of that, and I'm sorry if I'm sounding redundant. If you do have any specific parts that trouble you in the game I'd be more than happy to help. I don't own any Mushi games so I'm unfortunately not much help there.

Also all this DFK talk has me trying once again for that elusive arcade 1-all. I switched over to B-S from C-S and feel like it's overall a better ship for me to my shock. Some parts are definitely harder due to less spread but the higher speed (and the seemingly stronger laser) help make up for it.
I hope someone can answer this: is there a trick to N-Exy's 2nd phase opener that I'm missing? If I don't accidently ram one of the fast pink bullets I seem to always ram a tiny blue bullet that I didn't see due to focusing on said pink bullets.
Also is it just me or is the stage 3 midboss ridiculously harder than the stage 4 midboss (or is the stage 4 one that ridiculously easy)?