I don't like these timed games and may not finish, but here's level one:
1 & 2 - tree branches on left and right
3 - hand of guy in orange
4 - heel of man on right
5 - line in purple skirt
6 - missing links in chain
7 - shoe of man on left
8 - monster mouth
9 - dog collar
10 - large spot on dog's backlevel 2

1. Frankenstein's face
2. ogre's ear
3. left flower on van
4. headlights
5. frog lower left
6. left front wheel
7. mummy's wrapping (on back)
8. headband of girl in van
9. right side of Dracula's cape
10. point on left side of Dracula's capelevel 3

1. object bottom riht of sign
2. man's medallion
3. middle of purple barrel
4. bottom left border of canopy
5. inside canopy - bottom side right
6. between edge of canopy and top of man's head on right
7. exclamation point on sign
8. top shelf left - extra pyramid
9. dog's front paw
10. front top post of canopylevel 4

1. left house - top shutters
2. left house - bottom right window
3. middle house - middle window
4. just right of sausage links
5. man's stray hair
6. top of brick wall (towards left side)
7. center line of surfboard
8. bottom left moon
9 & 10?Level 5

1. big/little bat on the top right.
2. top part of the gate/fench on the right.
3. bottom part of the gate/fench on the right.
4. brick on the left wall (below vulture).
5. 1 or 2 pipes on chimney on the house.
6. left wing of vulture on the left.
7. between octopus and left arm of man.
8. yellow (or not) in second window from the left.
9. Green ghost on the top left missing one foot (or point from his cape).
10. Staff/scepter from creature in top left window (next to green ghost).

Walkthrough from escapegames24