are you accepting contributions? I made a rumble patch for the 2.50 version that works with my EZ Flash Omega DE and should work with other rumble capable flash carts. I also found a bug in the first level where walking through the door to move past the “elite exploding room” renders a blank screen. Seems to work fine in the emulator but makes me unable to finish the level on an actual Gameboy Color. I would be happy to fix the bug myself!