It was a pleasant game - thank you!
I can only think of three matters off the top of my head. First, the movement is quite jerky, and feels unresponsive because of it. Second, the spheres that disappear when the button is pressed should, it seems, be at least outlined. Their exact positioning is hard to memorize because of the uniform background, and, together with the movement issues, they can cause a reset without any clear fault from the player's side, hitting a connection line with only their edge. A simple outline when they are deactivated would be more than welcome! Finally - and, admittedly, there is some jealousy in this point - the name does not quite fit the action. Entanglement in its most used form is quantum entanglement (these days, at least), and is about transferring properties between what is entangled, while here it is just a connection, albeit one that does not impact the properties of the things it connects.
But these point are hardly any effective attacks on the game - quite the opposite. I only see how the game could be made better, which, undoubtedly, is twice as true for its author. There are no issues, only imperfections, a thing to be expected at jams. So, I shall repeat myself: it was a pleasant game - thank you!