This game was fun when I originally played it on armorgames.
Checked it here to see if it was on since flash will soon be out of use and wanted to try playing it with the newgrounds app to solve that flash issue.
I read the comments from years back saying the game didn't work and just said "download latest flash player", so I had guessed that was just a browser issue they had since the comments were so long ago. I tried playing it on the newgrounds player, and it had the very popup they were talking about, so it's only my guess now that this game is probably unplayable now unless it gets a bug fix, or whatever is causing that problem on the player.
Still, it was a good game back when I could play it.