http://armorgames.com/play/3297/atomik-kaos-2-orbits

Be a mad scientist with this shoot-em-up based on atomic chain reactions.  Sounds dull, doesn’t it?  But how many other games involve making the entire animal population deaf and dealing with the cheetah’s complaints that they are no longer the fastest land animal in the world?

I really like the in-game music on this, too.   Lovely.

http://www.kongregate.com/games/Reflexive/music-catch

Easy-to-play, hypnotically pretty and very, very relaxing.  Collect the shapes, as many yellows as you can, avoid the red ones and don’t miss the purple ones for a bonus.

http://www.kongregate.com/games/moogoat/dodge

I love this game.  Good minimalist retro futuristic graphics set to an excellent trance soundtrack.  Slightly reminiscent of Rez on the PS2 in it’s look and feel (but in 2D), the idea is not to shoot the enemy (you don’t have a weapon), but to get them to shoot each other. A very clever and well executed variation on the shoot-em-up.