I love the Low-Fi sounds. I love how the game basically finished downloading before I could check if the Xbox even accepted my button press. I love the little things like how the height of the cars in Stage 1 blocks most of the bullets (giving you time to notice the shooting, before 1 bullet makes it over the edge), and how the stage gimmicks tell their own little story. It's got so much of the little stuff that rocks in older games, that many new ones just seem to have never understood.
When I felt that the game feels weird without a double jump... I got a power up bot that let me have one. The Attack power of the mecha is JUST strong enough to make it feel like taking it through the 2 boss waves is worth it, without it trivializing the thing.
I haven/t seen the real slowdown yet, but any feeling I've seen from running too many enemies on screen in a chase, or such, feel like that good old Seven-Force style "THANK GOODNESS FOR SLOWDOWN!", rather than poor optimization. But we'll see as I get past stage 2, which I'm saving until I play Couch Co-Op with my brother.
Oh, and I love how satisfying the basic melee attack is. Quick, does nice damage, covers a solid area, and the after-effects are color coded between the 2 main characters. It's got a solid activation area that makes me want to use it, and I've already gotten 2 achievements for spamming it, lol.
The secret characters attack melee-style. Which still shoots energy waves. So they look more like Strider characters, rather than pure Contra. The default specials seem to be the same between the 2 main protagonist so far.