Really fun game! The controls felt really responsive and intuitive. The artwork was fantastic and the audio was perfect for the setting. The humor was a nice added touch and I laughed out loud a few times at their comments.
I really liked the level design. The way the game teased the higher blocks early on made me think I was missing some sort of input or movement tech to reach them, and then I saw the rocket packs and everything made sense. That was a really awesome touch. I also loved how the camera tilted up whenever you went behind a tall block, so the player could still see the character. That's a very impressive level of polish for a jam game!
There were a few places where the platforms felt a little bit unfair. It's an issue I've had with 3d platformers for a long time where sometimes judging distance is just too hard especially in the front-to-back plane. You had the shadow under the character which helped a lot with that issue but whenever I used the jetpack I had a really hard time with it again. One solution I can think of for that would be to make some of those platforms be more generous to land on (coyote time). Another would be to have something to fill the same functionality of the shadow when you're hovering over the void (not sure what that would be but just a thought).
Good game overall, I really enjoyed it! :)