Good idea and concept. I liked the gameplay moment when I had to ignore a collectible by jumping over an obstacle and coming back later. The concept is well suited to this sort of mechanic, if you plan on continuing the project it would be cool to design around it!
Would've loved some more sound effects generally. The game feels kinda quiet despite the piano (which I think was beautiful, but a bit too dramatic for the gameplay part) because of this.
The issue with the viewport somebody else mentioned is true! You definitely need to play in fullscreen.
I don't see too much connection with the escape theme, although I loved the encouraging quote at the end.
Keep up the good work!