There are a few issues with the game but the overall aesthetic of it is really good. Especially for a game jam. The major problem i see is the big scope of the idea of the game. I personally think it is not fit as a quick play but more for a short session.
Most of the bugs are already been pointed out so i won't go over that. I'd recommend going for a smaller scope in a GameJam.
Also i'd recommend using Arrow-Keys instead of Num-Pad as some Keyboards do not have a Num-Pad.