Beat Hazard 2

I like this as you can tailor the perks to help your playstyle, such as choosing weapons, or focusing on a pacifist multiplier, or if trying a very hard difficulty, adding more lives in.

There has been a huge overhaul of the game's graphics compared to its predecessor, with gorgeous looking lighting effects, including new explosion graphics.

I personally found my sweet spot on the Apocalyptic/Zen difficulty, which seems to be the in the top 3 or 2 most difficulty, respectively.

More ships more weapons, more bosses, bigger visuals, improved sound effects, and more accessibility to ANY music playing on your system...

It's also fun starting back at square one, and unlocking everything again, perk unlocks are very frequent, and it won't take long before you get your favorite weapons back, and unlock some new ones to see what you think of them, and settle on your ideal load out since you can only use 4 special weapons at a time.

Or you just want a couch coop fun, you can play on a Party mode and blast through the galaxy together.