Agreed! I personally found it too easy, and had to close the game in my final test cause there was really no "dying" if you knew what you were doing.
I had un-used back end code sitting in the game that scaled the enemies bullet speed, and fire rates per-round up to a 'limit'. But disabled it because I didn't have time to fine-tune it. Would definitely introduce it again as a core-focus in a future bullet hell game if I ever made a sequel in future jams. 😎