I love this game. It is actually an educational tool for everyone who didn't have the physics in school (yet) or wants to relive it or try some old ideas. Challenging fun, genius.
But there is one flaw
In the sandbox:
If a simple cup upside down is placed in a shallow saucer. Then fill it up to the top. Remove the paintspraythingy. Then the cup will stay filled, in spite of the connection to the outside at the bottom which you closed while it was filling). Now make a hole in the side for a splitsecond and close it up quickly. There should only get a bubble of air in the cup! But notwithstanding the hole is closed again, all fluid will drain! What a pity. If that bug is fixed, more would be possible.
But a great app anyway!
