Great game! It's a simple platformer with a fun mechanic of connecting the wires. One critique I have is the ports not having a pronounced outline. I noticed them in some areas, but they would blend to easily in the brighter colors of other areas.
I never used the 'R' key to release since jumping already did that for me, but I would just have the same mouse click or 'E' key to do that instead to simplify the control scheme.
Nice job and congrats on your first game!