I have always been a fan of games by Treasure since i first played Gunstar Heroes way back in the mists of time, their new game is now out on steam and its awesome its a very clever vertically scrolling shooter and is worth a fiver of anybodys money !
looky here: http://store.steampowered.com/app/253750/
Review here: https://www.youtube.com/watch?v=-4fzFvQzWtw its the Gamecube review but theres little difference in the versions.