Rolling ball game concept isn't a bad concept itself, but I have a few points as a kind of recommendation for future jams/games you make:
- First, consistency. I think you were telling a story with your game but when things change out of nowhere in a non-intuitive way it can confuse the player. In this example the final destination for the player and the camera zoom weren't consistent and it can be confusing at first.
- Second when you join a jam it generally is to make a game with the limitations and the learning opportunities that brings (Also the fun), it would have been harder but possible to make this in an actual 64x64 pixels resolution and would recommend to join smaller and simpler jams too that have less restrictions when starting out.
- The last one is the game itself is not bad, movement is well implemented and level design is not bad either, great for a first game and good luck in the ones that will come! Hoping to seeing you grow in your journey :)