I'll get the negatives out of the way quickly first.
As everyone is saying, a tutorial is definitely required, I got stuck on level 2 and only passed level 1 by sheer luck (Very fitting of the theme). There is some explanation between levels, but I think the games mechanic is hard to put into words, so it was hard for me to understand...
BUT,
What I did play, was great. I'm a huge fan of low-res pixel art so straight away the art-style is a 10/10, the pushing system and undo mechanic where very reminiscent of BABA IS YOU in the best way possible, so more positives, and the main mechanic (although confusing) is very unique and interesting.
Overall, a great idea sadly restricted by lack of context (understandable due to the 2-day time limit). I truly believe that with more time, this could become an amazing game.