In order to use Bruce Lee efficiently is by taking out the other
enemies and then when they are stunned and knocked out,
concentrate on one of them.  When you have defeated him go
back to the other enemies and use multiple enemy attacks such as
Multiple Jump Kick, Multiple Hurricane Kick and Multiple Low Spin
Kick.  If you have trouble getting close to an enemy he/she
might be backing up, so lock on to someone else ( I call this
taking turns) it seems as though the enemies are taking turns,
some of them back up and you see the others get close to you. 
In later levels though this dissappears and you deal with all of
them at the same time.  When it comes to sub-bosses and
bosses use moves like Counters and Throws.  Early in the game
these attacks won't be available so always be prepared to block. 
!REMEMBER! I started the game accidentally on HARD and you have to
constantly use the Block.  On EASY on the other hand blocks
are always helpful too considering that taking on nume!
rous foes can chip away at your health meter.  When fighting
sub-bosses and bosses always use the block if you anticipate an
attack.  This will greatly help you to Counter and Throw when
he/she is near you after a blocked attack.  Using these
strategies in unison with the Dragon Tokens can have devastating
effects!