Good job submitting to the jam!
The windows build worked on linux with wine for me, but by the rules of the jam, we're supposed to have 3 separate native builds (windows, linux, mac), or one html build, which this game could probably work just fine as. Lack of a web build deters a lot of people from trying a game, and that means less people rating it.
This has a decent amount of content for a first game jam submission. The game is rough and there is work to do on physics, but overall, nice start.