Swarm

The shooter secondary attack can only be used when you are in the shooter form. Just use this attack 7 times before you beat the game and it should unlock after you win.

Dashing gives you a rather short iFrame to move through some of the laser attacks, or get away from an attack or small bee. Some attacks, such as the laser sweeps, are unavoidable, so unless you dodge you end up getting hit. Instead of dodging, switching to the shooter or melee form works to get away from these attacks. You can dodge in both forms, so make sure not to accidentally hit the dodge button.

You can only heal by breaking the green orbs, or killing a green bee if the orb breaks before you destroy it. During some phases you'll see a lot of orbs spawn, so you can either wait until you break 8 orbs before moving on, try to destroy every green orb that pops up during the entire fight. This will unlock if you healed 8 times once you beat the game.