I liked the graphics and music (especially how it changes when slowing down/speeding up the time).
The mechanic appears to not be that original but it's well executed. The only issues I noticed were the spike hitboxes (they are too big - I died on a spike even though I didn't touch it visually) and probably a lack of coyote time (something felt weird when I tried jumping off a moving platform while speeding up time).
Liked the zeppelin theme. You can even have a small rave when you get to the water due to how the sky changes.