http://www.cronosoft.co.uk/Iron Sphere, by Ian Munro, is a top class traditional 2D puzzle game full of hazards to test the skills of any retro-fan. Set at a bird's eye view point, and featuring nice colourful graphics and sound effects, the game has all of the classic game play you want at the quality and price you have come to expect from Cronosoft.
I love companies like this!
I'd love to have a development team for dreamcast games it'd be imense!