I built my mobile app using MIT App Inventor
I used some Horizontal Arrangements and Buttons with images to looks as it's now
For the Blocks screen, I programmed when I press the Arrow, it automatically changed from the empty to filled.
The rest as the same.
First to connect with the bluetooth.
Then, the 4 sides with something cool, I make the Head a button too, when I press on it, the eyes chaned from empty to fill with blue color.
You can download my files here:
