Thanks for the great level. I loved it.
However, I'm stuck towards the end and I'm not sure if it's a bug or I've missed something.
I've got all the powerups, Red, Yellow and Blue keys (not found Purple yet), all 49 temple collectables and 89 of the feathers. I've completed the main level and got to the credits. Two shifts at the top of the credits are blocked by the Purple Gate and 50GC achievement. Fine. I assume I unlock the 50GC mode by going to the right of the Temple collectable corridor and activating the 'night-mode' shift. But that shift just drops me back at the start of the credits. If I go to the top and use the return home shift, it takes me back to the start in 'day mode'
So, have I missed something or is the 'night-mode' shift broken?
EDIT: Never mind. I missed the "Sleep until night" feature. Easy to miss!