I'm very glad I played this game! Going into the mines for a loved one is a very touching way to connect gameplay and story through a mechanic--really well done. In addition to that, it was also fun to figure out a good strategy and get rewarded for it (getting upgrades and eventually learning recipes feels great). I felt pretty frantic trying to figure out how to get the health potion, which honestly felt like another really good way to connect the player to the story. I also liked the art! 

Here's some more feedback if y'all decide to continue this game:

• My first attempt I died in the mine. I didn't actually understand that being in the mine was hurting me. I just didn't really realize it, maybe because it wasn't really giving me feedback. I guess as a general note, I didn't really immediately understand a good amount of the UI (eventually it makes sense though)
• I thought I had to do something to deposit materials (also didn't realize you only deposit coal). I tried a handful of keys until eventually I realized it happens automatically because I had more cash than before.
• When I first opened the store, I thought I was going to be able to buy the cure with gold, so I was a bit confused why the price was low. I just completely missed the icon next to it that told me it used gems for some reason. Might have just generally seemed unclear at a glance for me.
• I thought at first the order of the gems might matter. In one of my playthroughs where I was still learning, I tried different orders in desperation to get some potions.  After I made my first potion I fortunately tested the same gems in a different order to realize it didn't matter after that point.
• Minor visual bug: I think the scaling of the fear meter gets a little messed up as it goes down. It's super minor, just tripped me up a bit because I was trying to visually gauge whether the amount remaining was the amount that took me to get to that node. In a way it made me more paranoid as to how accurate it was, which I guess is a fitting experience to have haha!

Really great job! I think it's rare to see gameplay really fit a story like this, well done!

Finally get through the game. Got to admit that I didn't liked it as first, being very confused on what should be done and stuff like that, and died a few times because of it.  (For the first round I didn't even know there is a mine half way through, I guess I was just thinking this was steam world dig) But once figured out what is happening, I was then finally enjoying what the game has to offer. What I especially like is the urge to heal your father or he dies. It really force the player to do stuff rather than playing around.

Now to the nitpicks. I feels like the mining was a bit too simple, it would really adds a layer of complexity to the game to spice up it a bit. Say, multiple ores each giving different gems, ores that require potions to mine, so on and so on. Potion crafting is a interesting mechanic and I really enjoy how it's the actual important part of the game. I ends up needing something to write down the combinations so that I can use that effectly. Not that I am complaining but it would be better if there is some sort of recipe once you successful make a potion. You could probably then make that system way complicated than what it is now and still don't overwhelm the player.

Anyway, I think you did a good job, especially given that it's just 4 days for you. Well done!

That was fun! At first, I was under the impression the spook meter was going down too quickly, but after I played around with the items, I understood the loop pretty fast.

The art's cool and tells clearly what each thing is. It's endearing, in a way.

The sound effects are fitting and I really liked the music! The house one reminds me of music you'd hear in the 80s. The cave ambiance is also super good, really nails down the creepy and sinister factor!

Only thing I'd point out is that maybe it'd be nice to show the dad's health bar on the top of the screen at all times, considering that it's a game over condition and all. Though maybe the intention is to make the player visit their pa once in a while, which never hurts to do, ey?

The potion system was also key to being able to finish the game, so it's good that it was able to have relevancy! Sometimes, we can implement systems that end up not having as much of a spotlight, so it's good that you guys were able to avoid that.

This was really good and worked well. I had a lot fun seeing the numbers go up and emptying the shop. Good work, and keep making stuff!