I took a good look at all I had written in my design doc, and I think that there's enough stuff here to make a cool videogame. Sprites, music and other FX are probably not going to be what I had in mind when I started this project, but I'll still do what I can with the assets I have. In any case, changing sprites during production is possible and not too difficult.
Instead of starting to program right away, I've been working on splitting the huge sprite pool that I have in multiple folders to divide them well between enemies, items, hud elements, maps, etc. etc. It's going to take a while to do that too. I have to tweak most sprites in order to at least bend them a little to my vision.
Currently working on: Working on organizing assets
Time spent on the project so far: 39 hours