Ah yeah I needed to make that clearer! It's basically a stealth game. If you get "spotted" the enemies will all come and shoot you. You can use the bushes to hide in.
If you drop a banana within a certain radius, the guards will stop patrolling and eat the banana. You can drop it in the bushes for example on the first one as long as its close enough. When you're in the bushes the guards won't see you. And then when they're eating you can hit X a few times to kill em. I might add some descriptions to the game so its more clear, thanks for letting me know!