First... man, sorry to hear about your rough 2015. My 2016 is shaping up to be "one of those years" thus far, so I can sympathize.
Second... heh, I have my own story about a "cursed" game...
The first time I rented it as a kid, the next day, our backyard was overtaken by a swarm of killer bees, which had been running rampant in Arizona, where I lived, at the time. No one was hurt, but it was scary as hell.
I rented it a while later, and that night, my mother ended up in the hospital, with what turned out to be blood in her stomach. Seems some medicine she was taking was eating away at her stomach lining. *shiver* She fully recovered, but again, scary.
That alone was enough to convince me the game was cursed for many years. But eventually, I decided to give it one more shot, figuring that my superstition was silly. I downloaded a ROM and started it, and within days, while not as bad as what happened before, a house we were mere days away from moving into was pulled out from under us for some contrived reason I don't recall exactly, leaving us trapped with an unpleasant roommate for at least another year.
It was after that, that I deleted the ROM and all traces of it from my computer and swore I'd never play it again. Clearly, the gods do *not* want me playing Lagoon.
The game kinda sucks, really, so no big loss.
Third, regarding the "Shovel Knight/Freedom Planet" thing... hrm. I'm leaning towards Freedom Planet, because *all three* of the LPers I follow (raocow, Roahm Mythril, and Pink Kitty Rose) have done Shovel Knight. Mind, if you *want* to do Shovel Knight, I'd hardly object, because that game is teh awweeeessssuuuuummm, but I've never seen Freedom Planet in action, so that'd be cool.
And finally... looking forward to the future Mario projects. I'm enjoying your Lost Levels run (I haven't posted, but I *have* been following it), even though like you, I'm not wild about the game itself. SMB3 is especially going to be fun. I absolutely love that game. Still my favorite of the 2D Mario games.