Pretty environments, but sometimes the obstacles get lost until I've hit my boomerang against them. Maybe another colour would be better, but that could compromise the nice visuals as well. Also cool dynamic lighting. Like the presentation in general, and while the boomerang is a bit difficult to control, it displays every info you need to do so. So it is mostly a matter of practice.

It's fun! Good work on the UI and consistent art style. Some comments:

- controls are intuitive and feel like it would be good also with touch controls

- in the first tutorial it was not obvious I had to go to the first check point orb, maybe direct the camera towards the objective for a few seconds will help

- some UI icons could use text labels/tool tips (end of level buttons)

- I like the various puzzle mechanics, some are definitely challenging and require precision

Dig the aesthetics and navigating the UI / tutorial was fairly easy - I didn't get lost.
For now I've only played a few levels but I can see a lot of potential for mechanics.

I'd recommend adding some stronger highlights or outlines to clickable objects. I was a little confused at the level select screen. Having the buttons "indent" is great visually but hovering over levels and some buttons could use extra oomph - Especially since your keeping the UI sort of flat (which is good aesthetically so keep at it!)