Kept me on edge the whole time! I really like that you have to juggle peeping through the hole, recharging the batteries, and activating the devices. The stylized 3D art really lends itself well to such a genre and dev time constraint. The audio works really well, it conveys many details, most importantly how close you are to losing, which is a more interesting idea than a health bar.
Personally it was a bit too hard for me. A single mistake can cost you your run. Its a bit too easy to drop a battery instead of inserting it. I wish you could swap an empty and full battery without dropping one on the floor. It's also impossible to distinguish a charged and empty battery once they are on the floor.