Thanks so much for your notes!
The trick with that first screen is to jump into the boomerang. If I did it again, I'd move the second platform so that the player would have to jump before the throw. You can also throw the boomerang backwards, so perhaps a pillar would have been more apt.
I really like the boomerang as a mechanic, so I imagine I will be going back to these tools later on.
Thanks for playing!!!