If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Space - shoot.
G - grenade.
1, 2, 3, 4, 5, 6 - select weapons.
Z, X, C, V - assist.
You are a bad gangsta beanie! The worst and best of your kind, no one messes with this broadbean and you are going to make it well known! Get the game started and flex your sprouts through the vast wasteland destroying everything which dares to cross your path!