If you have an iPad or iPhone and dig Radiangames (and why wouldn’t you?), you will want to check out the newly released Inferno+, aptly described as a cross between Geometry Wars and Gauntlet.
Additionally, Super Crossfire and Super Crossfire HD have been updated with a new survival mode, while Fireball SE, Ballistic SE, and Gobs of Fun have all received minor changes that you can view on the respective iTunes pages.