Very nice game, congrats on finishing your first one. The graphics were simple, but pretty effective, I also really liked the shake and sound effect when you press the switch. It's also pretty fun. I do think you can improve on some things tho, and they are pretty simple to fix.
Please make the camera look ahead of the player instead of behind, I don't want to see what's behind me, I want to see what's in front of me. You can easily fix that in cinemachine. Some platforms felt out of place, they didn't fit the rest of the artstyle, just change them if you have time. Also, I don't think you need to tell everyone your age.
But seriously, great job, especially for a first game.