This is a little game I made last year for the Secret Santa thing on the MFGG forums. I've updated it slightly and released the updated version on itch.io (was going to post it on MFGG, but they rejected it):
https://onpon4.itch.io/kitten-command
It's a simple arcade game. You use a cat with a gun to shoot down Bowser's troops before they break the wall behind you and make their way past the left edge of the screen.