I do my best to listen to the community!
The Feedback Form in the game has over 1500 responses, and a lot of them mentioned they wanted more levels and enemy types. Endless Mode also came up a lot, which definitely contributed to the direction of this update.
Many people also wanted a Sprint ability, which is why we now have a Jetpack.
If I had listened too closely you would have had a boring thing that just makes you run faster, rather than fly forward with special sword cuts. :)