Hey, sorry for the late reply and thanks for trying the demo.
So I watched the video, didn't really notice anything weird happening so got nothing to comment on there really.
As for your feedback:
Glad to hear the movement / feel is good.
Not sure about the input lag issue though, I haven't really noticed anything when testing myself but I only test on keyboard and 2 different controllers so not sure if that could be a factor.
Other than that, Vertical Sync could be a factor to input lag, pretty sure I have this turned on by default, turning it off could improve input latency but at the cost of possible screen tearing.
There's actually quite a lot of coyote time, so much so that you can probably jump after falling for a full tile (horizontally) depending on speed before falling off the ledge.
Glad you like the visuals and atmosphere as well, these two things are a pretty big factor for me when making the game.
Anyway, thanks again for trying the demo and making a video. :)
Also, I'm probably not going to subscribe, sorry, I pretty much only subscribe to friends and the like, I liked the video and left a comment to try and help out a bit at least.