This app is well-conceived, but really needs some help screens or users guide, IN ENGLISH. You have to try to figure out on your own how to access the various features, and what happens when you tap on different objects on the screen, and the configuration screen isnt any easier to understand. The (just found today) instructions on the app description page help a little, but more is needed. The support and website links go to the same place, and theres no guidance in English on either the main site or the blog.
Its easy to figure out how to position the players and the ball, and not too hard to figure out how to draw lines of various colors. However, its really tough to understand how to change modes, and what will erase lines and reset the screen, how to save and reload screens, as well as other features. It took me a while to figure out that the red eraser (if thats what its supposed to be) resets the players, and the blue one erases the lines youve drawn. It took even longer to figure out how to use the plus key and start key in the lower left are for animation playback, but it is a useful feature. I have not figured out the save and load functions at all.
Finally, the various control objects (erasers, pencil, plus sign, arrow) are too close to each other on the screen. Many times Ive erased all the lines accidentally when trying to tap the pencil to draw another line.
Overall, pretty good idea for an app, but HOW ABOUT SOME BETTER INSTRUCTIONS FOR USE?!!!!!