I had the same problem as TragicCommons: the linux build didn’t have any .pck file. But I got it to work by taking the .pck from another build.
Unfortunately, the prototype is too short to give constructive feedback. Except maybe for the colour palette, which I liked. From what it looks like, you wanted to make a puzzle game? A sort of Sokoban?
But you succeeded at the most important thing: submitting something! And I’m sure you learned a lot, even if it doesn’t pay right away. I hope you’ll be able to get more done next jam! :)