Update v20170728:
Improvements to text size in 4K.
More robust save checks to protect against information loss in rare cases.
Improved mouse and keyboard support for the Inventory screen.
Fixed numerous issues with the collectable keys and item lockers.
Fixed a bug that capped the use of Extra Life / Checkpoint Packs to 3 per level.
Fix for an infinite lives exploit.
Disabled 'Sticky Keys' during gameplay.
Various Simplified Chinese UI fixes.
Improved German translation.