diff --git a/include/card.h b/include/card.h
index 63f4ea7..ee02419 100644
--- a/include/card.h
+++ b/include/card.h
@@ -72,4 +72,4 @@ void card_object_set_selected(CardObject* card_object, bool selected);
 bool card_object_is_selected(CardObject* card_object);
 Sprite* card_object_get_sprite(CardObject* card_object);
 
-#endif // CARD_H
+#endif // CARD_H
\ No newline at end of file
diff --git a/scripts/get_memory_map.sh b/scripts/get_memory_map.sh
index c685022..6b0f03a 100755
--- a/scripts/get_memory_map.sh
+++ b/scripts/get_memory_map.sh
@@ -1,20 +1,29 @@
 #!/usr/bin/env bash
 
+set -euo pipefail
+
 POOL_DEF_FILE='./include/pools.def'
-ELF_FILE='./build/balatro.elf'
+ELF_FILE="${1-./build/balatro-gba.elf}"
 READELF='/opt/devkitpro/devkitARM/bin/arm-none-eabi-readelf'
 TOTAL_BYTES=0
 
-get_pool_names() {
-    grep POOL_ENTRY "$POOL_DEF_FILE" | sed -n 's@.*(\(.*\)).*@\1@p' | sed 's@,@@g' | cut -d ' ' -f 1
-}
+if [ ! -f "$ELF_FILE" ]; then
+    echo "elf file not found: $ELF_FILE"
+    echo "You can pass your elf file with:"
+    echo "    $(basename $0) <file>"
+    exit 1
+fi
 
 print_line_break() {
     echo "--------------------------------------------------------------------"
 }
 
+get_pool_names() {
+    grep POOL_ENTRY "$POOL_DEF_FILE" | sed -n 's@.*(\(.*\)).*@\1@p' | sed 's@,@@g' | cut -d ' ' -f 1
+}
+
 print_line_break
-printf "%-16s| %-10s | %-10s | %-10s | %-10s \n" "Object" "location" "pool size" "func size" "bitmap size"
+printf "%-16s| %-10s | %-10s | %-10s | %-10s \n" "Object" "address" "pool size" "func size" "bitmap size"
 print_line_break
 
 for name in $(get_pool_names); do
@@ -34,14 +43,14 @@ for name in $(get_pool_names); do
         )"
 
 
-    location="$(cut -d ' ' -f 2 <<< $output_pool)"
+    address="$(cut -d ' ' -f 2 <<< $output_pool)"
     pool_size="$(cut -d ' ' -f 3 <<< $output_pool)"
     func_size="$(cut -d ' ' -f 3 <<< $output_func)"
     bm_size=16 #always gonna be 16, 4 * sizeof(u32)
     
     TOTAL_BYTES=$(( TOTAL_BYTES + pool_size + func_size + bm_size ))
 
-    printf "%-16s| 0x%8s | %-10u | %-10u | %-10u \n" "$name" "$location" "$pool_size" "$func_size" "$bm_size"
+    printf "%-16s| 0x%8s | %-10u | %-10u | %-10u \n" "$name" "$address" "$pool_size" "$func_size" "$bm_size"
 done
 
 print_line_break
diff --git a/source/joker.c b/source/joker.c
index e9447f1..63b71bd 100644
--- a/source/joker.c
+++ b/source/joker.c
@@ -50,7 +50,7 @@ static bool used_layers[MAX_JOKER_OBJECTS] = {false}; // Track used layers for j
 
 // Maps the spritesheet index to the palette bank index allocated to it.
 // Spritesheets that were not allocated are
-static int joker_spritesheet_pb_map[128];
+static int joker_spritesheet_pb_map[MAX_SPRITES];
 static int joker_pb_num_sprite_users[JOKER_LAST_PB - JOKER_BASE_PB + 1] = { 0 };
 
 static int get_num_spritesheets()
diff --git a/source/pool.c b/source/pool.c
index e2f150e..363b715 100644
--- a/source/pool.c
+++ b/source/pool.c
@@ -5,7 +5,7 @@ void pool_bm_clear_idx(PoolBitmap *bm, int idx)
     // Divide by 32 to get the word index
     u32 i = idx >> 5;
     // Get last 5-bits, same as a modulo (% 32) operation on positive numbers
-    u32 b = idx & 31;
+    u32 b = idx & 0x1F;
     bm->w[i] &= ~((u32)1 << b);
 }
 
@@ -15,7 +15,7 @@ int pool_bm_get_free_idx(PoolBitmap *bm)
     {
         u32 inv = ~bm->w[i];
 
-        // guard so we don't cal `ctz` with 0, since __builtin_ctz(0) is undefined
+        // guard so we don't call `ctz` with 0, since __builtin_ctz(0) is undefined
         // https://gcc.gnu.org/onlinedocs/gcc/Bit-Operation-Builtins.html#index-_005f_005fbuiltin_005fctz
         //
         // By using the bitwise inverse of the word, you can skip words that are full
@@ -38,6 +38,5 @@ int pool_bm_get_free_idx(PoolBitmap *bm)
 
 #define POOL_ENTRY(name, capacity) \
 POOL_DEFINE_TYPE(name, capacity);
-#include "sprite.h"
 #include "pools.def"
 #undef POOL_ENTRY