One thing you could do, inspired by Galaxian: For some of the enemies in that fight, when they're destroyed, instead they shift to a second form that dive-bombs the player.
That could get amusing. All sorts of different things you could do here really.
So, you want to make it yourself, then?
And yeah, I didn't find this boss all that hard, but it's above the difficulty level of the floor 1-2 bosses for sure. It's like a couple of the other bosses like Centrifuge: intimidating at first, all those metal monsters and the high number of shots can panic the player into taking damage, but the way to dodge that actually isnt tough to do. It's just a matter of actually realizing it.
He seems pretty easy really. I usually just fight him in the basic starter mech without upgrades. It actually surprised me that he was put on floor 3+. Wallmaster is sooo much harder than the Invader is.
But, yeah. I'll try to get a hard mode done for it. Right now I'm working on a dual wielding buzzsaw melee attacker and a zombie apocolypse miniboss/boss.
Well, the bosses are typically placed according to my own thoughts on them.
Wall master is one where I can sit literally right in front of him and not get hit; I need no distance to dodge his attacks. Originally, I'd thought that the boss was going to need a buff of some sort or it'd be a pushover, but Chris said otherwise. As did a few others.
Invader goes higher because the multiple enemies create alot of additional vectors that shots can come from. In this case they're very straightforward shots, but still, more vectors typically equals higher difficulty, particularly for those players that have trouble following what's going on. I'm thinking this is why Battleswarm can be alot of trouble to some players, but super easy to others. Not to mention that the idea of a boss consisting of more than one unit is rare so far. Only the Warden and Labyrinth break this rule otherwise. Well, technically Terminus has it's two guardians, but they're almost entirely seperate fights so they dont count.
I do intend on adding a "swarm" boss though, possibly later tonight, been wanting to do that for awhile since the swarm behavior makes for some fun designs.
that reminds me when I tackled the wall master on my current run I unloaded my machine gun onto him and won in 5 seconds flat amused me quite a bit.
Wait, what? How did it go down that fast? Which weapon was it, exactly? Was it that thing the green mech uses?