Unfortunately,
This IS a simple game of rock paper scissors. You have rock, paper, and scissors. Now, granted the arms were animated fairly well. However, everything else was just... so bland.
Alright. So you start the game off. You see the options Rock, Paper, and Scissors. There's two arms there, we're already guessing they're there for the shoot. And this bland, white background. Okay, so maybe something super cool happens....
Okay, apparently nothing cool happens. You get some arbitrary points, and some money to buy a shield (which would be more helpful if it had more than one use. Not a ton, I'm talking like, maybe 3 uses.), and a clover, which is by far the most expensive, most useless powerup I've ever encountered at any period in time ever.
In summary, more powerups, more flashy stuff, more excitement, and definitely add some music.
Peace!