The game seems to work between 84+'s. (I tested it between a 84+ and 84+SE). However, it's quite unstable, in the sense that after a round it's hard to get synched again (needed for the game to start, and a failure results in a RAM clear most of the time).
Say, could anyone (Madskillz?) port the level editor to .8xp? The source is in the same archive as the game is.