To advance to the next level, touch the flag (not the pole!) Use (whatever you attached the Makey Makey to!) or arrow keys to move and jump. Collect the coins. Jump upon Goomba enemies (twice!) to beat them. Here's a walkthrough for the original by @PaulKoning: https://www.youtube.com/watch?v=ONtHRrN-cDQ
@PaulKoning aka TheAndroidGuy for making the orig