It's not really the physics but when you have a big brush size place water against a wall while having a big brush size if you keep holding right click the water freaks out for a bit. Also there is a way to fly without pressing the button X. Pressing the C button you can throw stuff one is a shape, two is a sphere jump keep jumping and keep on pressing the C button while facing down. The reason you can fly using this technique is because one, your jumping off it, two there is no cooldown meaning you can do this unlimitedly without falling back down unless you slip a bit. Also the game crashed my pc. And my parents are strict.