More mushrooms:
     When  mushrooms  appear,  collect  them,  leave  the screen, then
return to collect them again. Repeat this until they no longer appear.

Large med-kit:
     When  fighting a Deadite or Hellbilly, turn on your chain saw and
slash  at them. After a few hits Ash should jam the chainsaw into them
and  keep  it  there.  Then, use the ax and hit the Deadite while your
chain  saw  is  still  in them. When they die, they will usually leave
behind  a Large med-kit. You can also use the other weapons instead of
the ax, but it just wastes ammunition.