Although you're right to say there was a bit of time mismanagement, there's enough here to testify to your proficiency as a developer. With commitment and planning, I suspect you'll make great things.
While there isn't much of a game here, your spin on the limitation is next level. A single 8x8 texture for the whole thing? Brilliant. 5/5 there.
Great work so far, and good luck! :D