Finally got the chance to play it. Great work!
Some things I've noticed:
No introduction of controls after <, space, >; would be nice to show inventory (E) shortcut somewhere.
You could stuck on the "basement" between Gnarcier "rocks" and the trigger (or next block) when you jump over, until it kills you. I can't say it's a bad thing but penalty is high for the first 10-15 minutes of gameplay.
Taff for some reason tells you: "You're the only being in heptaverse that can use it" (even if it's true it's kind of weird to hear/read, very cliche). Maybe something like "the only being left", or "the only being we found" (depending on backstory etc).
I like the save mechanics, but it saves even enemies locations, hope it won't backfire.