Solution found here:
https://www.cpc-power.com/index.php?page=detail&onglet=solution&num=2826
There is a short solution and a longer one. Both are provided.
SOLUTION COURTE
---------------
01 - N
02 - E
03 - D
04 - E
05 - GET SPANNER
06 - W
07 - U
08 - S
09 - W
10 - U
11 - N
12 - JUMP ON BED
13 - U
14 - E
15 - LOOSEN BOLTS
16 - GET HEAD
17 - W
18 - D
19 - S
20 - E
21 - E
22 - ENTER MIRROR
23 - GIVE HEAD
SOLUTION LONGUE
---------------
001 - E
002 - EXAMINE CLOCK
003 - GET WATCH
004 - W
005 - UP
006 - SOUTH
007 - GET BALL (Magic Cricket Ball)
008 - NORTH
009 - NORTH
010 - EXAMINE FOOTPRINTS
011 - JUMP ON BED
012 - UP
013 - NORTH
014 - W
015 - THROW BALL (At Bats And Crickets)
016 - GET SUN (Newspaper)
017 - EAST
018 - EAST
019 - GRAB BANDAGES (Mummy Unravels)
020 - GET CAN (Subtractor Fluid)
021 - W
022 - NORTH
023 - PRESS BUTTON (On Stopwatch)
024 - GET WINDCHEATER
025 - WEAR WINDCHEATER
026 - DROP WATCH
027 - SOUTH
028 - SOUTH
029 - DOWN
030 - SOUTH
031 - DOWN
032 - W
033 - SPRAY CAN (Cancel Adder)
034 - DROP CAN
035 - UP
036 - GET BULLET (Silver)
037 - DOWN
038 - DROP WINDCHEATER
039 - GET GUN
040 - LOAD GUN
041 - EAST
042 - NORTH
043 - EAST
044 - GIVE SUN (To Dracula)
045 - GET STAKE
046 - DOWN
047 - GIVE STAKE (To Hounds)
048 - EAST
049 - GET SPANNER
050 - W
051 - UP
052 - W
053 - SOUTH
054 - UP
055 - SOUTH
056 - SHOOT GUN (At Werewolf)
057 - DROP GUN
058 - NORTH
059 - W
060 - GET CANDLESTICK
061 - EAST
062 - NORTH
063 - UP
064 - EAST
065 - LOOSEN BOLTS (On Frankenstein's Head)
066 - GET HEAD (Impossible de prendre la Tête si nous portons trop d'objet, Drop Spanner)
067 - W
068 - DOWN
069 - SOUTH
070 - EAST
071 - EAST
072 - ENTER MIRROR
073 - GIVE HEAD (To Headless Horseman)
Score 115%
Note : Your torch will last about 80 moves, if more light is needed there is a Lamp in the
Laboratory and Matches in the Bathroom.
