Click the flag like three times. Arrow keys to move, m to open your map, down to interact, e to open your inventory. You can hover your mouse over things in your inventory to see their descriptions. I tried to keep this mostly intercompatible with the original, but had to change a few things, such as changing the platforming script from color sensing to sprite sensing, and adding a bunch of new stuff to the code (I've commented on the things I've added, and explained some of it.)
I made this a long time ago, and originally, I wanted to add comments to every piece of code that I added so anybody could use this template to make their own games. The problem is that I was too lazy to finish writing all of the comments, so while a lot of it is explained, there's a bunch of stuff you would need to figure out yourself if you want to use it. Feel free to remix and add more comments.