Here is the full list of all 21 Crazy Scientist achievements.
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Touch 30 times to mushroom
Collect 20 flasks
Get damage in the amount of 30 units from the ghost
Get damage in the amount of 30 units from the zombie
Shoot 150 times
Jump 50 times
Level 1 started
Reach level 2
Reach level 3
Reach level 4
Reach level 5
Reach level 6
Reach level 7
Reach level 8
Reach level 9
Reach level 10
Reach level 11
Reach level 12