It took me a moment to understand what I was supposed to be doing, but once I did, this was quite enjoyable - and also quite challenging! I especially like the creative interpretation of the theme here, and the little fingers have very good animations.
One very minor thing - if a finger creeps up where the hammer is, it's impossible to grab it as the hammer got prioritised in my attempts. But I am admittedly unsure how that could be done much better. Maybe exclude the bottom right from spawning new enemies?
Overall, a great and enjoyable little time waster! Keep up the good work!