diff --git a/game.sh b/game.sh
index c308bd9..40c3b62 100755
--- a/game.sh
+++ b/game.sh
@@ -9,7 +9,10 @@
 # print status: wheels
 # generate a map of where we have been
 
-playintro=0
+# debug options
+enablestory=0
+enablebattery=1
+enablehazards=1
 
 # $1 message
 echowait () {
@@ -18,6 +21,8 @@ echowait () {
 }
 
 intro () {
+    [ $enablestory -eq 1 ] || return
+
     echowait "CRASH!!!"
     echowait "ah!!"
     echowait "..."
@@ -27,21 +32,45 @@ intro () {
     echo ""
 }
 
-[ $playintro -eq 1 ] && intro
+meetsplork () {
+    [ $enablestory -eq 1 ] || return
+
+    echowait "...waht?"
+    echowait "i was down in the tunnel and my batteries died..."
+    echowait "how did i get back?"
+    echo
+    # we need to make this visually distinct so it's not confusing...
+    echowait "i can help with that!"
+    echo
+    echowait "AHHHHHHH"
+    echo
+    echowait "whoa there! its ok!"
+    echowait "i saw ya down there in the depths and figured"
+    echowait "you's prolly what made this here light-hole."
+    echowait "figured you came from up there so maybe you's a light-thing!"
+    echo
+    echowait "you're a... you're a..."
+    echo
+    echowait "brave n mighty rescuer, yup. that's me. name's splork, nice to meet ya!"
+    echo
+    echowait "..."
+}
 
 maxbattery=10
 
 depletebattery () {
+    [ $enablebattery -eq 1 ] || return
     battery=$((battery-1))
 }
 
 # position id
 # start roughly in the middle
-# vertical movement +/- battery
+# vertical movement +/- battery*2
 # horizontal movement +/- 1
 # this setup allows for different "cells" of different values which can be hashed for fun and profit
 # without actually needing to do any 2d math or *shudder* collision detection
 # making the number of columns equal to double the battery means that we can never reach the edge of the map 
+# battery is doubled to allow us to move at most battery units in any direction
 posid=200 # (2*maxbattery)^2/2
 
 # $1 direction
@@ -68,14 +97,14 @@ move () {
     checkhazard
 }
 
-# TODO: generate a map
-# TODO: put hazards on the map
 # 80 random cells out of ~400 (calculated from maxbattery^2)
 hazards=($(shuf -i 0-400 -n 120))
 #echo "${hazards[@]}"
 # split the hazard cells proportionally into sand traps and hard rocks
 
 checkhazard () {
+    [ $enablehazards -eq 1 ] && return
+
     # are we in a hazard cell?
     for hazard in "${hazards[@]}"; do
         [ $posid -ne $hazard ] && continue
@@ -90,23 +119,54 @@ checkhazard () {
 
 # is there something to find upon examination?
 mushrooms=($(shuf -i 0-400 -n 200))
+foundmushrooms=() # list of positions we found mushrooms at during a run
 
 # inentory should be persistent between runs
 inventory=0
 
-examine () {
-    # are we in a hazard cell?
-    for mushroom in "${hazards[@]}"; do
-        [ $posid -ne $mushroom ] && continue
-
-        echowait "there's something growing here! found a mushroom, yay!!!"
-
-        inventory=$((inventory+1))
-    done
-}
-
 # lightning mushrooms
 # round mushrooms
+checkmushroom () {
+    for floormushroom in "${mushrooms[@]}"
+    do
+        [ $posid -ne $floormushroom ] && continue
+
+        # don't find the same mushroom twice
+        for foundmushroom in "${foundmushrooms[@]}"
+        do
+            [ $posid -eq $foundmushroom ] && return 0
+        done
+
+        return 1
+    done
+
+    return 0
+}
+
+examine () {
+    depletebattery
+
+    checkmushroom
+    local result=$?
+    if [ $result -eq 1 ]
+    then
+        echowait "there's something growing here! found a mushroom, yay!!!"
+
+        # TODO: make it so we can't pick up the same mushroom twice
+
+        inventory=$((inventory+1))
+        foundmushrooms+=($posid)
+    else
+        echowait "didn't find anything :("
+    fi
+}
+
+endrun () {
+    echowait "my battery is low and it's getting dark ;-;"
+
+    # reset run-specific memory
+    foundmushrooms=()
+}
 
 run=0
 while [ 1 ]
@@ -114,30 +174,7 @@ do
     run=$((run+1))
     echo "day $run"
     echo "...awake and fully charged!"
-
-    if [ $run -eq 2 ]
-    then
-        echowait "...waht?"
-        echowait "i was down in the tunnel and my batteries died..."
-        echowait "how did i get back?"
-        echo
-        # we need to make this visually distinct so it's not confusing...
-        echowait "i can help with that!"
-        echo
-        echowait "AHHHHHHH"
-        echo
-        echowait "whoa there! its ok!"
-        echowait "i saw ya down there in the depths and figured"
-        echowait "you's prolly what made this here light-hole."
-        echowait "figured you came from up there so maybe you's a light-thing!"
-        echo
-        echowait "you're a... you're a..."
-        echo
-        echowait "brave n mighty rescuer, yup. that's me. name's splork, nice to meet ya!"
-        echo
-        echowait "..."
-    fi
-
+    [ $run -eq 2 ] && meetsplork
 
     # we have access to the shop after the first run.
     if [ $run -gt 1 ]
@@ -173,14 +210,12 @@ do
                 ;;
 
             "examine")
-                echowait "you look around and see many interesting things!"
-                depletebattery
+                examine
                 ;;
             "move")
                 move $(gum choose "north" "east" "south" "west")
         esac
     done
 
-    echowait "my battery is low and it's getting dark ;-;"
-
+    endrun
 done