I like the consistency in the art style, self made assets have a lot more personality than getting random assets from here and there. I also appreciate that there was a story included.
As others pointed out, the lack of audio is something that is quite obvious but of course it can be hard to make time for it in a game jam.
Small technical problem: if you zoom in on the webpage you can see outside the intended play area. Should be an easy fix for next time! Also since you didn't have a downloadable game the "Quit" button is redundant. (since on a browser it just freezes the game.)
I found the use of the "special object" creative, it was actually a core part of the gameplay!