Every time you make the correct pattern, the game becomes difficult. The game starts easily when you have only two or three changes to make. Required changes start to increase as you progress through the game. And the real fun begins when the small grid which you observe starts to rotate.
Draw
Quizc
Monst
Arrow
Vinta
Merge
Virus
Bubbl
Birdi
Siren
Stick
Princ
Tri F
Endle
Piggy
Minec
Pink
Domin
Glow
Super
Screw
Fish
Tunne
Space
Dibbl
Geo D
Cross
Fishi
Dont
Dress
Flapp
Jumpi
Tatto