Where is the coin in Abide by Vesta?

Hi guys,

my problem is that I have problems getting the only coin in Abide by Vesta.

ID:40142736

I was giving me hints but I didn't manage to get it unlocked for some reason.

Can anybody help me?

What I know so far about getting the coin is:

- The first cube section at the very end of it you have to tap the green orb late to touch the ground with the
becoming ball.

-In the robot part you have to jump perfectly to the question mark block to get reversed ufo.

-Being reversed ufo, you will be automatically transformed into reversed spider and activate the trigger.

-...???

I have been following these steps but the coin doesnt appear at the end. This means I am skipping something.

What else must I do to get it?

Thanks