Thank you for testing! Will definitely address the visual readability, tighten up world consistency, fix saving issues, add more puzzles, and do some rerouting to make the progression feel natural and not so forced at the chase sequence. In retrospect all the exploration should have been done before the chase instead of treated as an optional "post-game," or at least if there is to be post-game content it should not become visible until after the mainline content is finished.
Apologies for the somewhat abrupt and disappointing ending. The demo is a proof of concept cut down from a larger idea involving way more locations (the original idea was that after leaving the house the player would use the transit pass to take a train to an office building with its own giant sprawling research facilities, and just keep going from there), but maybe it's appropriate to consider the concept proven enough to start building those other locations (and their respective puzzles). I'll see how much I can get added by DD65.