To flip, you got to hold down the mouse on the water bottle. Your flip power will show in the top left corner. Try to find out what's supposed to be in the flip power zone. Try and get a streak. Also, despite the the thumbnail, you can't cap the water bottle. I'm planning on adding that feature in the future.
This game may still have bugs. If you find one, please report it. Thanks to @iGregory67 for helping me code this. Let me know if there's anything I should add to this. This took a fair amount of time to make, and it was hard to make, so please don't disrespect it. If you don't like it, just tell me why, instead of just saying, "This sucks!" Telling me why you hate it is way more helpful than just pointing out that you hate it with no advice to fix it/make it better.