The different types are:
normal
chainsaw
bomber
gunner
rocketman
swordman
jetpack
turret
bombardier
bazookaman
fast bomber
There are also powerups:
Mine
freeze
airstrike
E-storm
x-ray
E-punch
you can also put double ray so anyone else can play(2 players).
Its got openfeint support and 3 different difficulties.
FOR FURTHER INFORMATION GO TO: http://www.youtube.com/watch?v=vj5vMaXJVoA