Very high level of visual and audio polish, and excellent level design! This is the kind of stuff you would expect to see in a full release, but you managed to create it in only four days, so good job!
Overall I had a lot of fun playing the game and the fundamental game design is solid (you can't go wrong with a sokoban game), but there were several small quirks that made it less enjoyable.
Firstly, the fact that you have to be facing an octagonal box in order to rotate it using the r key means several times I found my self accidentally pushing the box when all I meant to do was turn to face it.
The fact that boxes can't be pulled (which isn't necessarily a problem), combined with the lack of an undo feature and the unskippable dialogue each time you restart and the frequent softlocks (e.g. pushing a box into a corner when it needs to be somewhere else) made the game feel tedious at times.
Also, starting at the first level that two sources of the electron beam were introduced, there were several moments where the beams did, in fact, visually create a loop, although not in the exact intended way, which led to a small amount of frustration as to why it didn't register (during closer inspection it's possible to see why the loop isn't actually complete, but at first glance it's hard to notice).
I greatly enjoyed playing; the puzzles were each challenging and most had a good "ah-ha" moment, so great job! Most of my criticisms are small details, it has a very solid base and a lot of potential to be a great game.