I think the game may be longer than 4 hours, especially if you aren't familiar with King's Field. I've just been exploring around casually and I'm well over 4 hours in. It's quite nice and I'm really impressed with how bug free it is!
I really like the money system too. I've had to manage my resources and try to save up for stuff I want. The magic seem swell balanced and useful also.
A couple things that maybe could be improved:
I don't think the truth mirror description will appear for the 'Mama-maneater'. If I remember right the player has to be within 1m of the creature's center to trigger the description. If a creature's collision is too large, the player can't get close enough for it to work. Maybe you could put a regular ranged trigger event to display the description when the mirror is used near mama.
I feel like maybe creature's ATKs are too low. It was fairly early when I could take 2 hits from mama-maneater and still be alive. I had physical armor equipped with a total value of around 2 (ie not much armor), but my strength was ~30 which effectively gives +6 to armor. It's possible I just did too much wandering around and 'power leveled', and I don't mean it's bad at all. I just mean my personal preference would be for enemies to pack a bit bigger punch.
Another personal preference, I would have liked more intro story and story development along the way. The character/truth mirror stuff is interesting and well done, I just thought something more fleshed out would help to pull the player into the adventure. Especially if the person playing isn't a Kings Field fan already.
Overall, my first impression hasn't changed. It's really well done -amazingly so for how quickly it was made, nicely balanced, excellent map layout and most important it's just plain fun!
