The music and art create a great atmosphere.
I'd like to see the spike hazards to be more visible and obviously threatening. They don't actually look like they'd hurt me, so I was confused for a bit. Also, I'd like the spikes to never be placed in on edge spots where I MUST walk into them to jump between platforms. That feels unfair.
I'd also like to see more diversity in how the player can use each shape. I always only use the human to jump between platforms, and I always only use the robot to fight if there's an enemy on the platform. I feel like I'm repeating the same actions too much.
Maybe if the human had to dodge moving hazards, or quickly traverse series of falling platforms, or jump to hit switches, the jumping experience would feel more varied. For the robot, maybe having different types of attacks to use, or different behaving enemies that you have to fight in different ways would make the fighting feel more varied.