This fork makes the buttons rounded, also supports transparent background :D
A little program that shows keystates, keys per second and total keys for rythm games (osu!, stepmania etc).
Extra buttons can be added or removed (minimum 1, maximum 10).
Button/text/kps colors can be customized.
See Releases
Right click to access a menu that does stuff (add/remove buttons, exit).
Click a button (blue square) to assign a key to it.