Really strong concept! Never played trail to oregon, but that was what this made me think of xD Also made me think of Death Road to Canada!
I think the night phases can be really fun when you have some items, kinda like in tower defenses, but when you have bad luck with events, or are just discovering the game and don't know what to do with resources like me, you end up watching zombies come to you without knowing if you're missing some controls or anything :( I think adding something to do in these phases, even if it's useless to gameplay, would made them feel more interesting!
And random events can be fun, I think! Having to handle situations that really mess with the chances you thought you had make for great stories xD But I don't think any goal was indicated apart from "surviving"? Maybe I missed it :( But that makes going from random event to random event more frustrating, cause that was the only thing I could be looking forward to. It's maybe too much to ask for a game jam, but having some milestones, or at least one final point, would make a huge difference in my opinion!
But still, GG!!! This is a really good looking game, especially if it's your first! xD Be careful with the size of the pixels by the way! Some screens (title screen for exemple) look like they have huge pixels compared to others!
Thank you for the game!