I missed Scoop Kick's anniversary last year, but not this time! I have published a new update to a public beta branch which features an arcade styled endless mode. You can find it from the far right edge of the map or launch into it directly by editing the game_options.ini file associated with the game.
I originally made this update for a physical Scoop Kick arcade machine, but I thought why not share it publicly since it's the anniversary.
Check out this video with a bit more info too: