Hey there! Thank you for the detailed review!
We'll consider adding an option for moving the camera when pressing shift (Officially called peeking in code) to analyze the situation.
The "Double jump" was kind of an intended glitch, we noticed it pretty early in development but even though it was really easy to fix (Had to delete one line where the jumping state was resetting after letting go the jump button) we just let it there because it was fun for speedruns lol. We did fix it for an upcoming post-jam update we want to release very soon because it kinda breaks some puzzles in ways we didn't end up liking.
And about the other bug, I don't even know how you managed to find that, we never noticed it lol. But we changed how changing the layers works and apparently it got fixed.
Thank you again for the bug hunting and kind words!