You'll know what to do once you start, trust me.
This is the third of my reaction test games. Here are the other 2: (not sure why they aren't links) #1: https://scratch.mit.edu/projects/1291516214/ #2: https://scratch.mit.edu/projects/1316938370/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 420 blocks