thanks for the kind words! sorry it was too difficult. the game is intended to be one where you die many times before getting good enough to beat it, a type of game i really like, but it’s not for everyone.
some general advice i can offer on the beam mechanic: it’s much quicker to kill enemies with the beam once you have a charge, and if you lock on to 3 enemies before you switch polarities, that’s how you combo (your beam will just refill immediately)
for the boss i think it’s most important to focus on survival. the beam does decent damage but you don’t need to worry about it too much about it, just focus on hitting the eyes with bullets. if you change polarity for every blast from the background, the only precision dodge you have to do is from its combo blast which is one in every seven blasts i think.