I am beginning to work on this project again, lots of changes are taking place.
I've decided to explore alternatives to the

Healer class, since in it's current incarnation it is boring to play and hard to write AI for. It also works against the

Troll class in that by healing teammates you are decreasing the amount of friendly corpses that drop and not contributing directly to the amount of dropped enemy corpses.
The corpse economy is my favorite feature, so my favorite idea for a Healer replacement is a

Thief class that steals corpses from the enemy base. It would have the same stats as the Healer(high stamina, low health), and stolen corpses would count more than the ones recycled by Trolls.
Goals:
Staggered respawning.
Actual class/team switching mechanics.
Endgame scoreboard.
Allowance for cooperative scoring.

Actual menus.
Secondary ability for Troll.
Horizontally-looping levels.

Different level layouts to choose from.
Arrows showing offscreen players.
Clouds to indicate maximum elevation.

Power-ups that drop occasionally.

Better sound effects.

Networked play.