▁six ▁world s ▁with ▁three ▁levels ▁each , ▁tot alling ▁to ▁ 1 8 ▁main ▁levels . ▁The ▁objective ▁of ▁the ▁main ▁levels ▁in ▁each ▁world ▁is ▁to ▁collect ▁four ▁jet ▁pod s . ▁Each ▁final ▁level ▁of ▁a ▁world ▁consists ▁of ▁a ▁b oss ▁fight . ▁The ▁level ▁designs ▁vary ▁from ▁snow - c apped ▁mountains ▁to ▁car n iv als . ▁While ▁most ▁of ▁the ▁levels ▁are ▁large , ▁out door ▁exc urs ions , ▁two ▁are ▁en closed ▁within ▁a ▁narrow ▁interior . ▁The ▁game ▁features ▁hidden ▁bonus ▁levels , ▁which ▁are ▁triggered ▁when ▁secret ▁ent ran ces ▁are ▁found . ▁Bon us ▁levels ▁consist ▁of ▁blocks ▁with ▁bal lo ons ▁in ▁them ; ▁po pping ▁the ▁bal lo ons ▁yields ▁either ▁co ins ▁or ▁power - ups . ▁A ▁time ▁attack ▁mode ▁is ▁available ▁for ▁any ▁level ▁the ▁player ▁has ▁completed . ▁ ▁Plot ▁ ▁The ▁game ▁begins ▁on ▁Cr ater ▁Planet ▁and ▁revol ves ▁around ▁the ▁story ▁of ▁an ▁ins ane ▁ast ro phys ic ist , ▁Baron ▁Alo ha . ▁Pl anning ▁to ▁make ▁a ▁large ▁profit ▁from ▁his ▁evil ▁ing enu ity , ▁Alo ha ▁removes ▁giant ▁pieces ▁of ▁land ▁from ▁the ▁planet ▁using ▁machines ▁to ▁turn ▁them ▁into ▁private ▁resort s . ▁Alo ha ▁also ▁removes ▁and ▁h ides ▁the ▁twelve ▁jet ▁pod s ▁that ▁prop el ▁each ▁world . ▁Wit ness ing ▁the ▁destruction , ▁the ▁residents ▁of ▁Cr ater ▁Planet ▁call ▁for ▁help , ▁and ▁in ▁response ▁the ▁Universal ▁City ▁Hall ▁dispatch es