Game Design Novice

I'm not asking for help. per se, (I'm new, and I HAVE read the noob guides) and I just want opinions on bosses I am programming. I'm programming a game with a freind about a random dude versus hordes of zombies. It's a maze-ish game, with hazards and standard zombies that move in the cardinal directions and walls of crushing spikes and acid. I'm thinking of two good bosses to really put the challenge in. (Actual in-game names used) And it has a very cartoony vibe.

MIDBOSS: Mr. Eyeball
A giant eyeball that has many tentacle thingies that must be shot. The eye itself is invelnerable until the tentacles are shot, then you can get hits on him. He shoot one homing blast from his eye, and one homing shots ffrom each of his four tentacles.

FINAL BOSS: Zombie Generator
A simple machine that spawns zombies that run straight down. Also fires homing bullets. A moving sphere moves left and right and must be shot. Three machines do the spawning and two turrets shoot.

I like drawing eyeballs, so I drew you one.¹

— hartnell

Midboss: What's the configuration of the tentacles? Do they block the shots of the player or is Mr. Eyeball just invincible until the tentacles are shot?

Final Boss: Is the sphere only a target? How does it react when shot?

— hartnell

How's about a living version of code it's self that shoots syntax errors.
- Peepshow