Love the look of that game, simple and charming!
Neat idea to have the countdown integrated like this. It's about perfect execution. But...
I do find it way too difficult from the get go. I did not understand the platforms being the countdown immediately. I wish the first real level started like the second one, where we immediately see the countdown on the platform and realize what is happening.
I wish platforms had different colors or ways to know what they were about to do. Red for up, blue for something that goes on the side, or another artwork. Something to differentiate them. I also found the levels to be rather difficult because they are pretty long. I was proud of my progress in each levels only to realize that was only the first part. And then you get stuck on the same thing again and again, having to redo what you know well every time.
The parallax effect is great but could use some tuning, as I found myself confused when jumping, because the first layer in the background moves at the same speed as we do on the foreground or something. It would help if it was slower than it is right now. And having the same parallax up and down as left to right would be freaking amazing, especially to judge how far we are in the level.
Neat little game, I hope my notes don't come across as too harsh. I find it pretty cool!