I completed the free Geometry dash app levels
The levels are increasing in difficulty. Did not focus for coins.
Geometry Dash world

my rating(too easy) took 1 attempt each

my rating(too easy) took 2 attempts each
took 10 minutes to finish the main levels
Geometry Dash meltdown

my rating(easy) took 10+ attempts

my rating(medium) took me 10+ attempts

my rating(medium) took me 25+ attempts
took 30 minites to finish to finish all the levels
Geometry Dash SubZero

my rating(medium) took me 100+ attempts

my rating(hard) took me 300+ attempts

my rating(hardest) took me like 700+ attempts
took 3 days to finish to finish all levels

Here is my stats on each one:
Geometry Dash world(I played a bit of the featured levels)

Geometry Dash meltdown

Geometry Dash Subzero