Press Space to start the game! Click on the menu buttons to select them. The "counters" work by clicking on them to pick them up, and clicking again to drop them. No combat here, I'm afraid.
Credit to the entire Super Smash Scratch team for creating different parts of this game. Forum thread: http://scratch.mit.edu/discuss/topic/57070/ Full credits there, along with more info. Latest beta here: http://scratch.mit.edu/projects/31876340/ Stable(er) alpha: http://scratch.mit.edu/projects/30953888/