Still a bunch of work to do on that front though. I've already made a pass through the game evening out the difficulty curve, and fixing some of the unfair artificial difficulty bits. Almost all the tilesets and backgrounds will be updated.
I'm also in the midst of updating the rest of the game. The Boss Rush can be found in the crashed airship level, and you'll need a save game that has beaten the secret final boss to access it. It's still is an incomplete state, but it's playable, and shouldn't have any major glitches (the Boss Rush that is, the rest of the update is only halfish done).
Support Newgrounds and get tons of perks for just 2.99 Create a Free Account and then. It's been a long time coming, but I finally have the Boss Rush beta for A Koopa's Revenge 2 up and running: A Koopas Revenge is by Lambtaco Super Mario is owned by Nintendo Sprites by Me.
