Wow. This game is perfect. I wish it was longer but the current length isn't bad. The crayons are pretty versatile and it was satisfying to throw them while jumping, because I felt like a ninja. And I'll get the obvious out of the way, this game is smooth and the movement feels natural.
The only thing that got me was using S and D for jump and throw because I'm so used to WASD to move. I had to consciously decide which button to use before I learned it pretty well. This isn't really a negative, I just thought it was an interesting bit of my experience.