There are 4 save behaviors:
"coins": The number of coins you have
"red character": Can either be 0 (not bought) or 1 (bought)
"blue character": Can either be 0 (not bought) or 1 (bought)
"selected": The character you selected
0 = black (default)
1 = red
2 = blue

Click the restart button to restart the level.
Click the trash can button to reset everything.