Chrome 42+ disables NPAPI plugins like Unity3d plugin.
Copy and paste the following text into your browser: chrome://flags/#enable-npapi and enable the NPAPI plugin.
Or try another browser like Firefox
Your task in Raccoon Rumble is simple: shoot and make sure the pineapple remains on the island. If you do this in as few shots as possible, you'll earn 3 stars. Play over 70 levels in which you must save the pineapples.