Hello, it is impressive to see your marble blast modification coming into fruition with all the other features you have implemented. It's a good initiative for learning purposes and hope you learned a lot with it.
That said, there’s a small issue that I’d like to address. In creating the mod, you have included a large number of assets—such as level geometry, textures, and sounds—from several other Marble Blast mods. While it’s great that you are exploring and learning from existing content, some of these mods have clear rules about how their assets can be used. Specifically, a few of them do not allow their content to be copied or redistributed without permission.
In addition to these licensing concerns, bundling all of these assets together has made the modification quite large in file size; It doesn't look like the mod utilizes a majority of those assets. This can make it harder for other players to download and play the mod, and can create technical challenges when distributing it online.
I know this likely wasn’t done with any bad intent—it’s a very common early step for modders to explore and mix content like this. It’s all part of learning. Encouraging originality and thoughtful reuse will help you grow even further as a creator.