Ya, I initially wanted to have some kind of progression and additional levels. But the further I went, I started seeing some flaws in the game design. The additional levels were going to be controlling the robotic mimic army across the island and then a 3rd level that was supposed to take place after a mysterious energy wave from some unknown source came across destroying parts of the world. That one was supposed to be like a mystery level of what's happening, and at that point I thought, "My current mechanics won't be as good for this..."
So I started to prioritize just the first level. I'm currently working on the updated version in figuring out how I would want to build it, I'm thinking this is a good starting point but I would like to actually show the characters :)