An interesting weapon idea: Burp juice. It could be like a soda can. If you drink it, It charges up a burp. When you activate the burp, You would start flying backwards by yourself and the screen would vibrate a little as you hear a burp noise. It would also makes some enemies get knocked back quite far. They wouldn't really die though. It would also be cool if you added a new enemy with this weapon called the "burper". It would be a creature that burps the way you do when you drink burp juice or when the frolgs die. However they would have more control on their movement.