I tried the game again and beated the general.
Yeah, I used all the skills but my mistake was spamming them since the cooldown times are a little bit long.
Personally, I think if something isn't meant to be used then it shouldn't be there since it could be confusing and you could use the normal attack by mistake.
In some rooms, there's some furniture that is placed on the walls.
Second time in the house, I tried talking to the sister (first time I didn't explore the house at day because I didn't know I was supposed to do that) and there's no dialogue, text boxes pop up but don't have anything.
I beated the prince and princess but the game crashed:
Lightning skills feel too weak (6 turns for 300 damage?), damage over time is too small to matter.
Sometimes boss fights drag for too long.
I lost to the zombie king and lost my motivation to continue, and I saw the other comment talking about a sad ending so, I don't feel like it will be worth it.
I still think you did a pretty good job, good luck with your game dev journey!