The use of color and general environment makes for a great place to hang out. Initially I had the impression that this would be a high-energy parkour runner with dimension swapping elements. However, the music gives the impression of a much more chill platforming experience.
Either way is great, but I think that either eliminating the timer in favor of a points system or amping up the urgency of the music would bring more cohesion to the experience.
Regardless, great work!