You can run straight out of the map the moment you leave the tutorial by going left. Since there's no restart button, at least not that I found, you have to restart the entire game, elsewise you just fall forever. This also means redoing the tutorial. I stopped playing at that point.
An immediate issue is how the vore is, at least from what I saw, always the exact same. It's more of a nuisance while playing than just enjoyable, as it constantly gets in the way of progression. The fact that you see the exact same animation everytime makes it more annoying than enjoyable as a result. Entering a ghost mouth, but getting the exact same animation as the tongue or worm, is a tad boring. Obviously, it's a very early demo, but one can only critique what is already present.
That being said, allowing people to immediately customize their HP and Stamina is a fantastic idea. It really lets people enjoy the game, which is kind of the point, right? Great touch, there. However, the font is...it's awful. Looking at the settings with that font on a 1440p monitor is prone to give migraines.