The sequel, International Ninja Rabbits, despite being released two years later, does not have much improvement. Only the graphics were upgraded.
Despite having an interesting premise, Ninja Rabbits suffers from many problems. Home of the Underdogs considers Ninja Rabbits to be horrendous due to bad controls, very easy gameplay, drab background palletes, and slow animations. According to Home of the Underdogs, some developers never learn. Therefore, Home of the Underdogs categorizes Ninja Rabbits as a "Real Dog".
There is a read.me file with the game, only containing the following text:
This is version 2.2 and contains some nudity, adult concent is high recommended for levels 5 thru 12!
(Though this was with the version on a shareware cd, don't know if it's always the fact with this game.)