Interesting idea, and well implemented! Good minimalist approach to the art style, and I found the music fit really well. Was definitely easy to cheese the score by getting an equilibrium and coming back after a few minutes and spamming cubes. You could take inspiration from Tetris and keep continually dropping weights but allowing the player to choose when to place then for a few seconds beforehand, if you wanted to de-cheese it a bit.
Concept was simple yet interesting, and the gameplay felt nicely polished. Good stuff!