coooool - this has a lot of potential and your level design is generally great, but I also had a hard time understanding a few things about the mechanic. Letting the player if a game object is "in range" to be linked and which objects can be linked, would have a very useful piece of information. I had to come to the comment section to learn that I can link SPINES and switch them with a box! Once that was clear, the game got real fun, real fast! Great job!