Disassembler puzzle game NABOKI temporarily free
I picked this up a couple of days ago after my find free app found it and man, I can’t say how oddly satisfying NABOKI is.

There’re no ads, no instructions, you just start with a shape and work at disassembling that shape.
Normally $0.99, which it’s worth, currently on sale for $0.00 – grab and enjoy.
Download: Google Play