If you’ve not ever played N+ (Or even it’s original free pre-cursor N), then you’ve been missing something.
It’s probably one of, if not the best arcade / scroller games out there. The game play is simply astounding, what it lets you accomplish with the tapping of simply 3 keys.
I kid you not. Watch this insane video – be aware though that this dude has pretty much achieved the pinnacle of human hand-eye co-ordination, and you could spend a major portion of your forthcoming days (if you manage to get yourself hooked into this game) just trying to get to be able to hope to do what this guy shows off so perfectly.