Thanks for playing and for your wonderful feedback!
Indeed, the "Double-balded sword" design is intended to have more playstyle/strategy even with one type of weapon throughout the game. And a satisfying feeling of destroying lots of them is what I was aiming for. Additionally, guiding enemies to go through/avoid certain portals is a featured gameplay I want to introduce to this vampire survivors genre as your movement now matters more than just avoiding being hit by enemies.I am really happy that you discovered and enjoyed all of them!
Lastly, you are right that the current version's balancing is slightly off. Since the double-balded effect now uses the same increment/decrement amount on bullets and enemies, I had difficulty deciding if the buff would make the game too easy (kill the fun) or too hard (hard to beat). I am planning to add more interesting upgrades in the future:)