I won't talk too much about the graphics and the sound design since you already know my opinion on that (I love it). I'll focus more on the differences from the DD55 demo.
It seems you've tutorialized the UI, which is fantastic, it really eases you into the flow of things. The woods section has been improved it seems - especially since now you don't show the map near the puzzle :P
I've managed to solve the causes of the electronics issues in the second location. Adding a second NPC is a godsent since you can now cross-reference their statements. Distracting the owner of the junkyard is a really, really nice touch, makes the place feel more "alive" and dynamic. Which is, once again, very welcome and great.
However, while I'm not sure I broke anything - I managed to jump over the stacked cars and got into the second area of the junkyard before it opened up. That route did not seem intentional. I don't think it counts as sequence breaking, but still. I'm the kinda guy who tries to hug walls and jump over everything, so you may want to prevent players like me from accessing stuff they aren't supposed to.
And secondly - the active area of the UI seems to be aligned a bit higher than the graphics would suggest. That gave me a bit of trouble because at first I wasn't able to read the bug lore - I clicked outside of the click area (on the text), did not see any change, and decided to proceed with exploration.
Anyway - love it, a very enjoyable game. Great progress, please keep it up!