I think there's something satisfying about how you're able to start gliding through the different levels after clearing a couple, like scissors gliding through wrapping paper; since you're able to see where all of the different collectibles are once you've switched between all 3 time periods in a level, you can start to look out for the different warps that might take you there and start to work out the path as you dash around. It makes the game feel really nice to play; to that end, I guess speed could be a nice element to emphasize if you ever had the urge to take the concept further in the future. Nice work!