You're right to be proud of the 3D section, it was really nice to navigate and look around at all the decoration! I especially liked the console sitting by the screen. I kept expecting something scary to happen, I was lowkey glad it didn't lol.
For the 2D section, I expected Space to be the jump button rather than the Up key but that's a minor nitpick. I really appreciate that when you fall off you respawn on the nearest ledge rather than needing to redo the whole section, especially because I kept dying right at the same spot (I think it was on me rather than it being too difficult, I just had a brain fart). Felt the absence of an exit button on the victory screen rather than needing to manually close the game. Overall it was a great job for a solo dev!