Updates/bug fixes and level solution

Hi everyone, a few quick updates:

• The "No Deaths" achievement no longer unlocks for Easy difficulty (since deaths aren't tracked for that difficulty mode)

• The question marks in "Ignorance is Bliss" have been made a bit more straightforward to grab

• A few people have mentioned that the solution for "Ignorance is Bliss" isn't very intuitive, since the momentum mechanic for green doors isn't explained beforehand, so I decided to record a solution for it: https://youtu.be/H212jKPeCWE

That's my bad for not making that more obvious. Anyways, thanks everyone for playing and providing feedback -- much appreciated!