Very atmospheric! I especially like the way you use lights to give the game more juice. I noticed two problems though:
First, I think the game is a bit too dark. It makes it hard to see the pressure plates which have a sprite that is very similar to the floor tiles. Maybe you could make the lights from the robot a bit brighter or change the pressure plate sprite?
Second, the hitboxes are bit off at times. The robot keeps getting stuck while turning around corners and while carrying boxes it gets stuck in hallways. Maybe make the pathways wider? Or you could prevent the player from losing energy if their position is not changing. This way, getting stuck would not feel as annoying. The pressure plates' hitboxes are also a bit misaligned and so I had to place the boxes a bit below the pressure plates to activate them.
Hope this feedback helps and I really enjoyed the puzzles!