Thank you for trying out the demo! We understand that a very core issue with the game currently is helping players understand the gameplay mechanic, that being the center of the boomerang's movement, and how that relates to traversing and clearing stages while keeping the rotation in mind and working around that as the challenge.
When it comes to the camera, most of the levels are designed around exploring and figuring out how to progress through the stages, so seeing the whole stage ruins that experience in our eyes. That being said there are definitely some areas in the game where it can be confusing where exactly to go, but we feel that does incentivize playing through levels again to get better times since they'll know the proper path to take.
The lives system in the settings menu disables lives as a gameplay mechanic, mainly for "purists" but also to let people play through the game to get the levels' treasures, which requires going through the stage without losing a single life. In the future we will definitely make that more clear to the player, or possibly change that system in general.
Handling the boomerang's spinning and rotation is definitely the trickiest part of the game, a gameplay tip we'd like to teach players intuitively is that if you keep on moving the boomerang you have less of a chance to hit a wall when stationary, because if you let the boomerang sit still for too long, you're basically expanding its hitbox to the entire rotation. We definitely understand that it's a very weird mechanic to get used to.
And yeah, we have noticed through playtesting and people playing the demo most people don't realize the game revolves around moving the boomerang and not the guy himself, but we found for most people they understand that within 15 seconds of the game, but I will agree it's not very clear.
Once again I'd like to thank you for sharing your thoughts on the game! Airstralian definitely isn't for everyone, but that being said it means a lot that you tried out the demo and gave us some good observations and feedback. Thank you for the wishes and we hope we can make the game as great as it can be!
-T