This is really good! It's cool how similar our games are, but how we went in different directions with it! I have two main suggestions: 1. The controls were a little confusing to figure out at first, so I'd suggest adding a compass rose (but with WASD instead of NSEW) 2. It also took me a few second to figure out which square was mine (though it was easy to figure out after moving once or twice, so not a huge deal), either making the controllable cube a different color, or have a glowing outline around it would solve that, I think.
Really cool game, I love the isometric view, and the environmental puzzles, I'd love to see more!