Hello everyone! I think i solved the problem with this game, The game has a bug bc the game is 16 years old , and also bc Flash closed down 2020 dec 31 ig..
BUT HERE IS HOW TO FIX:
First up, skip the tutorial and then play the game regularly until you get the bug, where there is missing a player like (if it show 3 players life, but there is only 2) press on MAIN MENU go to the menu, and click on SAVE then refresh the site, open the game and press on LOAD now go back to level you were playing and it should worked
if you have any questions, then just contect me HASTA LA VISTA !