Thank you!, We had no time to finish the boss so its quite bugged, but in theory you can parry his missile and every 2 parries hell tp back, or you can also get hit by it and it shouldnt damage your field, lastly the boss should tp back when he gets to your plants, put it doesnt work haha :/ its kinda fixed in the itch.io page web version.
Edit: To be clear the parry mechanic and tp mechanic when 2 hit works, its just the other 2 that didnt lmao (though the parry is kinda scuffed cos if u are too close the missile collider doesnt come out of draculas collider so if you parry it it technically never entered and the method doesnt get called )