Enemies
=======

* Enemy roaches
* Rat -- TODO
* Robot -- TODO

Vehicles
========

* Walking
* Roomba
* Quadcopter
* Robot

Weapons
=======

* Spit
* Butter knife
* Crowbar
* Gun

Only one weapon can be equipped at a time.
Smart is used for the ranged weapons (spit and gun) -- TODO.
Strong is used for the melee weapons (knife and crowbar) -- TODO.
Damage depends on the total number of roaches with the appropriate attribute
in the vehicle -- TODO.

Serums
======

* Smart -- operating important things.
* Strong -- pushing stuff around and opening doors.
* Fast -- speed.