I'll start by talking about Geometry Wars. It won't be a comprehensive post; you can find those elsewhere.
Now that the arduous task of moving into my house has completed and I've managed to get my Xbox360 back online, the first thing I did was buy Geometry Wars: Retro Evolved 2.
Even after seeing screenshots of it, I was stunned by how good the game looks. You think at first that there's only so far you can go with glowy neon shapes, but the visuals have really been stepped up. GW2 alone is a good argument for high definition screens. At any given time, the amount of detail and activity on the screen is beyond insane.
The variety of gameplay modes makes the pricetag, higher than its predecessor, really worth it. There are now SIX gameplay modes with everything from the standard Evolved to some more interesting stuff like Pacifism and Waves. Pacisicm pits you weaponless against the hordes of sparkling shapes after you. Your only recourse is the gates that litter the screen. If you can make it through one without hitting the deadly edges, the gate explodes, killing the guys around you.
...That's pacifism by the book!
Anyway, lots of interesting gameplay options in single player alone. What's REALLY cool is the local multiplayer options. I haven't had the game long enough to actually dig in, but having local versus and co-op modes is always a plus. That's what'll really make the game last.
The thumping music is still there, but with the different game modes you get different music, so that one song won't haunt you in your dreams quite as much.