This is the Genesis port handled post-mortem, with all of the various arcade and console version's content condensed into one package with a great re-balance to the difficulty. It still carries all the arcade game's DESIGNED jank, but the positive takeaways from this approach feel much more pronounced: Has a very simplified, apt and focused loop that makes it distinct from the more grandiose sequels, almost like a SMB1 situation. It's good, go play it.