This really shows how incredibly basic Flash was in its early years. The "games" were essentially just slideshows that would wait for user input in order to progress. This input could also only be clicks because, again, early Flash were formatted like slideshows that could only go forward. Nehi here didn't even loop the music when the game got to the point where it needed the user input. This is such a relic.
The only reason I'm giving it any credit is due to this game's ridiculous age, and the fact that it was a Flash game on Newgrounds before Newgrounds was even called Newgrounds. It's literally older than me by like 2 years (2001 baby here). Crazy how history can be preserved like this