I saw the thumbnail for this game, and I just HAD to play it, because it's very similar to an unfinished game of mine: https://signol-games.itch.io/four-left-feet?secret=6nxIMSA3xTKOyRGsD4q77tS881M. My game is like yours, with springs and keys, too! But mine is in 2D, haha.
That is to say, I love your concept. The game feels like it has personality (re: "You're doing great!").
The controls felt pretty intuitive, and the rooms felt varied. It was a little weird that I could get multiple equips on the same face of the cube, though. As far as I could tell, there was no way to change the face of an equip once I picked it up. Luckily, my configuration was good.
The length of the game was perfect for a jam game. Also, it was pretty easy to escape the map by bouncing over walls! I really enjoyed the ending sequence of rocketing down the hallway and into the sky. I didn't have time to read the final text, though.
I would love to see you guys make more rooms/equips in the future!