Thank you a lot for playing the game! Really glad you enjoyed it!. And I agree on the returning back to gallery owner, I was implementing a transition to go back, however I thought on the theme of the Jam "There and Back" so I was like if I implement a transition to return back, I might lose my points on the Theme rating, and also as you mentioned, level 2,3 and 4 have world hazards in which you can die from returning back to gallery owner. The coins, were for an upgrade system on boomerang and health with the shop owner, but did not implemented, because of time.
Thank you for the Feedback I really appreciated!