Here is the full list of all 10 Spencer achievements.
find the keycard and finish this level
find third battery and finish this level
find second battery and finish this level
find all 3 boxing gloves
find my fish and finish this level
find the second boxing glove and finish this level
find first battery and finish this level
collect all diamonds without being caught by the ghost and complete this level
find first boxing glove
find the Double Jump Boots and finish this level