Tips on how to not uhh, play badly at the Metal Slug games?

i just bought the anthology for ps2 and i played and beat them all but end up using about 30 continues for each game. any tips?Tips on how to not uhh, play badly at the Metal Slug games?
play so much you know the levels pretty much off by heart.. practice practice practice. metal slug makes me want to cryTips on how to not uhh, play badly at the Metal Slug games?
Pretty much what he said. Memorization is key.
Play very patient
memorize enemy and weapon spawns, and shoot, shot, SHOOT!also learn how to use the guns on the vehicles
the game is made to eat quarters like crazy so you'll die almost no matter how good ya get , scary difficult but metal slug game are awesome