It is a nice simple concept for a game, and impressive you have made this in ten days!
I think what can be a great improvement to your future developing, is to try to be consistent with your stylistic choices.
The art style, even though pixel art, varies a lot between different assets, which probably is because you had very little time for the Game Jam.
It's very valuable to make sure the visuals look like it's all part of the same world, otherwise it pulls you out of the experience if you notice something looks off.

There are a lot of existing sprites and assets people share online which are free or cheap to use if you don't have the time or tools to make them yourself.
There really is no shame in using them to your benefit.
I also saw your new artwork for the updated version, which looks cool! If you apply this to that design, it will make your game look great.

Also a small detail: the opening text font has a lot of space between the letters, which made it a little unclear.
If this was a deliberate choice, then this is fine of course, otherwise I would make sure that the story you want to tell the player has a clear delivery.

Cool project, I am curious how the new content wil look like!