▁away ▁bomb s . ▁The ▁C 6 4 ▁version ▁of ▁the ▁game ▁only ▁has ▁the ▁ball ▁b oun cing ▁bonus ▁game , ▁and ▁not ▁the ▁bomb ▁bonus ▁game . ▁The ▁game ▁can ▁be ▁played ▁by ▁one ▁or ▁two ▁human ▁players ; ▁at ▁least ▁one ▁f ighter ▁is ▁always ▁controlled ▁by ▁the ▁computer . ▁Un like ▁its ▁prede cess or , ▁International ▁Kar ate , ▁there ▁is ▁only ▁one ▁back drop . ▁However , ▁different ▁parts ▁of ▁the ▁back drop ▁can ▁be ▁re col oured ▁to ▁several ▁different ▁them es ▁by ▁the ▁players ▁using ▁specific ▁ke yst ro kes . ▁The ▁Am iga , ▁At ari ▁and ▁C 6 4 ▁versions ▁of ▁the ▁game ▁( and ▁possibly ▁other ▁versions , ▁un conf ir med ) ▁had ▁a ▁number ▁of ▁" background ▁ant ics ", ▁a ▁Pac - Man ▁would ▁appear , ▁a ▁sp ider ▁would ▁descend , ▁and ▁a ▁U - bo at ' s ▁per is cope ▁would ▁occasionally ▁be ▁seen ▁in ▁the ▁har bour . ▁In ▁addition , ▁pressing ▁a ▁certain ▁key ▁or ▁keys ▁would ▁cause ▁the ▁tr ous ers ▁of ▁all ▁three ▁protagon ists ▁to ▁fall ▁down , ▁after ▁which ▁they ▁would ▁do ▁a ▁double - take . ▁Additionally , ▁it ▁was ▁possible ▁( on ▁the ▁Am iga ▁version , ▁at ▁least ) ▁to ▁type ▁in ▁four - letter ▁cur se ▁words ; ▁the ▁game ▁would ▁respond ▁first ▁by ▁re bu king ▁the ▁player ▁for ▁their ▁use ▁of ▁such ▁language , ▁and ▁upon ▁the ▁second ▁off ence ▁would ▁reset ▁the ▁game