Neat platformer, I especially liked how causal it is. It reminds me of my first game I have made, ahh sweet nostalgia. Let's get back to the review.
The artstyle of the "The End Is Never The End" (I will use TEINTE from now on) is simple but charming. As I said it reminds me of good old memories so nostalgia points for you. The trail behind the MC is a cool detail but were I you I would change the trail's colour too in each level just like other objects do. Movement is responsive and works well with levels you designed.
But you could make or use more sounds and music in your game. I know that's a lot of work but even 15 second loop can make a difference especially when every level is different. Sometimes collisions doesn't work and MC can get stuck in a path. Next time use more maybe circle colliders or try to do your own physics model.
Overall I enjoyed TEINTE but some small tweaks are needed. Good job!