For anyone interested in trying to find the shortest path to go through every picture word, (and if we consider undo as a free move)/the smallest set of words to reach every word. I have 174 words (if we included every word in the tutorial):
WORM 0 WORD 1 WARD 2 DRAW 3 dram 4 DRUM 5 >dram 5 >>DRAW 5 dray 6 XRAY 7 >dray 7 >>DRAW 7 >>>WARD 7 bard 8 BAND 9 bank 10 TANK 11 >bank 11 >>BAND 11 HAND 12 >BAND 12 SAND 13 >BAND 13 >>bard 13 bare 14 babe 15 BABY 16 >babe 16 >>bare 16 BEAR 17 dear 18 DEER 19 dree 20 TREE 21 >dree 21 >>DEER 21 >>>dear 21 >>>>BEAR 21 GEAR 22 >BEAR 22 sear 23 SEAL 24 feal 25 LEAF 26 >feal 26 >>SEAL 26 heal 27 HEAD 28 herd 29 HERO 30 ZERO 31 >HERO 31 >>herd 31 >>>HEAD 31 >>>>heal 31 >>>>>SEAL 31 peal 32 PEAK 33 peck 34 DECK 35 >peck 35 >>PEAK 35 >>>peal 35 >>>>SEAL 35 >>>>>sear 35 STAR 36 >sear 36 >>BEAR 36 >>>bare 36 >>>>bard 36 BIRD 37 >bard 37 >>WARD 37 CARD 38 caid 39 ACID 40 >caid 40 >>CARD 40 carb 41 CRAB 42 >carb 42 >>CARD 42 carn 43 YARN 44 >carn 44 >>CARD 44 >>>WARD 44 wark 45 PARK 46 >wark 46 >>WARD 46 >>>WORD 46 WOOD 47 pood 48 POND 49 PONY 50 bony 51 BODY 52 >bony 52 BONE 53 bine 54 bide 55 aide 56 IDEA 57 >aide 57 >>bide 57 >>>bine 57 BIKE 58 >bine 58 kine 59 KING 60 RING 61 >KING 61 >>kine 61 >>>bine 61 wine 62 WIND 63 >wine 63 >>bine 63 >>>BONE 63 sone 64 NOSE 65 hose 66 hole 67 HOLY 68 >hole 68 >>hose 68 SHOE 69 show 70 SNOW 71 >show 71 >>SHOE 71 >>>hose 71 >>>>NOSE 71 ROSE 72 >NOSE 72 >>sone 72 SONG 73 >sone 73 >>BONE 73 >>>bony 73 >>>>PONY 73 >>>>>POND 73 >>>>>>pood 73 POOL 74 mool 75 MOON 76 coon 77 COIN 78 icon 79 IRON 80 >icon 80 >>COIN 80 >>>coon 80 >>>>MOON 80 loon 81 LION 82 >loon 82 >>MOON 82 >>>mool 82 >>>>POOL 82 >>>>>pood 82 >>>>>>WOOD 82 rood 83 DOOR 84 >rood 84 ROAD 85 goad 86 GOAT 87 BOAT 88 boot 89 boob 90 BOMB 91 >boob 91 >>boot 91 BOOK 92 bock 93 LOCK 94 LUCK 95 >LOCK 95 >>bock 95 ROCK 96 >bock 96 SOCK 97 >bock 97 >>BOOK 97 >>>boot 97 FOOT 98 FORT 99 fore 100 FIRE 101 >fore 101 gore 102 OGRE 103 >gore 103 >>fore 103 >>>FORT 103 >>>>FOOT 103 >>>>>boot 103 >>>>>>BOAT 103 >>>>>>>GOAT 103 COAT 104 CHAT 105 >COAT 105 >>GOAT 105 moat 106 ATOM 107 >moat 107 MEAT 108 neat 109 NEST 110 >neat 110 >>MEAT 110 tame 111 fame 112 FACE 113 >fame 113 >>tame 113 GAME 114 GATE 115 cate 116 case 117 CASH 118 bash 119 BUSH 120 >bash 120 >>CASH 120 fash 121 FISH 122 dish 123 DISC 124 >dish 124 >>FISH 124 pish 125 SHIP 126 >pish 126 >>FISH 126 >>>fash 126 >>>>CASH 126 >>>>>case 126 VASE 127 >case 127 >>cate 127 cite 128 CITY 129 >cite 129 >>cate 129 >>>GATE 129 date 130 DATA 131 >date 131 >>GATE 131 >>>GAME 131 >>>>tame 131 TIME 132 LIME 133 limp 134 lump 135 JUMP 136 >lump 136 >>limp 136 >>>LIME 136 mile 137 MILK 138 >mile 138 pile 139 PILL 140 gill 141 GIRL 142 >gill 142 >>PILL 142 HILL 143 >PILL 143 >>pile 143 PIPE 144 >pile 144 >>mile 144 >>>LIME 144 >>>>TIME 144 >>>>>tame 144 wame 145 wale 146 WALL 147 BALL 148 >WALL 148 mall 149 MAIL 150 hail 151 HAIR 152 >hail 152 >>MAIL 152 RAIL 153 RAIN 154 ruin 155 quin 156 QUIZ 157 >quin 157 >>ruin 157 >>>RAIN 157 >>>>RAIL 157 >>>>>MAIL 157 >>>>>>mall 157 >>>>>>>WALL 157 WELL 158 BELL 159 >WELL 159 >>WALL 159 >>>wale 159 >>>>wame 159 WAVE 160 lave 161 LOVE 162 >lave 162 >>WAVE 162 >>>wame 162 >>>>tame 162 >>>>>MEAT 162 >>>>>>moat 162 >>>>>>>GOAT 162 >>>>>>>>goad 162 GOLD 163 COLD 164 >GOLD 164 GOLF 165 flog 166 FLAG 167 >flog 167 FROG 168 >flog 168 slog 169 slug 170 PLUG 171 >slug 171 >>slog 171 >>>flog 171 >>>>GOLF 171 WOLF 172 >GOLF 172 >>GOLD 172 >>>goad 172 >>>>ROAD 172 >>>>>rood 172 >>>>>>WOOD 172 >>>>>>>WORD 172 >>>>>>>>WORM 172 WARM 173 >WORM 173