Hey this was super clever! This is definitely one of the most unique interpretations of the theme I've seen so far, and there is the seed of a really compelling game loop here. I could actually see this as a really fun little roguelike deckbuilder, it plays with space in an interesting way that most games in that genre don't do. Our team also made a game that place with space on a grid like this!
Congrats on a jam well done!