Desktop controls: Left and right arrow keys move to previous and next. Press space to go to a random number 500 to 999. Mobile controls: Left and right arrows move to previous and next. Left and right arrows marked with 'x10' move in tens. Tap on my watermark to go to a random number 500 to 999.
(c) Numberblocks Part 1: https://scratch.mit.edu/projects/1126593641/
