Not bad. Some suggestions:
- make it behave more like the original Launchpad (e.g. click on empty space makes it disappear)
- make number of columns adjustable
- make font and icon size adjustable
- I should be able to go back from a folder with a swipe or the back mouse button
- I should be able to select multiple shortcuts (e.g. by holding CMD) and move them to a folder
But, this is already better than what Apple gave us as a replacement for Launchpad, thanks! Will you add it to Homebrew?