It was a nice game! I felt like the background and music fit together very well.
I did however feel a bit lost reaching the end because there were no platforms in sight (having a camera pan function would probably fix that, like pushing the down key to make the camera move down) and in the lower section of the beginning, jumping to the right leads to death. This made me not want to do any jumps where there were no visible paths.
Overall it was enjoyable and I'm looking forward to see what else you make!