Found two softlocks so far (actually one of them might be closer to a hardlock? Not sure about the terminology): First, I knocked myself off a cliff with the megaphone as a scorpion was charging me, so the scorpion ended up occupying the place where I would've respawned and I ended up constantly respawning in the pit and immediately falling. Second, after reaching the area with the salad in the area where you get the blowdryer, I sailed away, fell into the water, and respawned at the area where the salad was with no way to get the boat back.
Since the demo doesn't seem to have a save function yet, I had to replay the demo from the start after the first softlock and I'll presumably have to replay it from the start again whenever I get back to playing this after the second.
The game's cool (and I haven't even finished the demo yet, or at least I don't think I've found everything), I just thought I should let you know about these softlocks.