I'm late to the game, but I'm going to attempt this challenge.
I made a small tile set for it. I also had a few versions of the main character before I settled on something very basic. The first version, I was going to use an asset I got through Humble Bumble, but it didn't fit right. So I tried to modify him enough to make him fit what I wanted, and that didn't work out too well. So I tried making my own from scratch (the bald guy on the right), but that didn't seem to fit very well either and might have taken a long time to create the assets. I even tried making a simple smiley face that would change color and expression based on its health.
The version I settled on was pretty basic, but I think still fits well into my vision. I can always improve on it later. So I cranked out most of the animations I'll need.
I also made some rat graphics to be the first enemy.
My plan is to mostly make my game a lot like the ASCII Rogue I spent a lot of my young years playing.
I also had an idea floating around in my head for years about a health system a little different than the usual. It's not an entirely original idea, but I really want to try it out to see if it will work out as a fun game mechanic. The system is geared around injuries and how those injuries affect the body. Loss of blood affects strength, energy, speed, eventually consciousness, and other things. So a cut has more long term issues than the initial damage. It also heals over time. I'm not trying to make it realistic, I just want to provide more consequences and ways to die than the usual hit points depleted, ran out of food and die instantly. I don't know, I hope it works out.
I had made a few prototypes in js, the last one was very complex. But for this I decided to boil the concept down it's the most basic elements for testing out the concept.
So I made this prototype:
http://devpirates.com/Proto/BasicInjuries/Injury.html
It's a lot more basic than my previous prototypes. There are only a few entry points and once it's in place it shouldn't be much work to utilize. One addition I made over all the other prototypes, is that I added in food and water so that the player can die from starvation like in the Rogue game I used to play. I'm making my game in UE4, so now I need to convert it to work inside that. Which is another reason for me to create a simplified version of it, to make it easier to move over. I plan to add toggles to the game to turn off food and/or water needs for the difficulty setting.
So now, in less than a month, I need to port the prototype health system, program the items, weapons, armor, and enemies, then create the dungeon generation system. It sounds so easy when I put it like that...
It feels simultaneously like there's plenty of time and no where near enough. But you seem like you're in good shape. Looking forward to seeing the result.