thanks for the feedback!
The hitboxes are one of the worst things in the game, I made some adjustments to all the bullets and the boss, but it still feels a little weird.
Actually, The original idea was to have weak enemies that would get stronger the longer you survive, the reason the boss design is so simple is because it was originally a sprite for one of the first enemies in the game, but then i ran out of time and change the game to be just a "boss fight".
Again, thanks for the feedback!