Causal Bit Games is keeping the 8-bit traditions alive with pixelated graphics, tunes that could play through the 2A03 with a VRC-6-enabled cart, and a sharp difficulty curve in its upcoming project, Insanity's Blade.
Causal Bit Games has put up a Windows-only demo through their Kickstarter campaign for those looking to try their hand at the game. It's also up for voting on Steam Greenlight. Insanity's Blade is scheduled to appear on Windows, Mac and Linux in April 2014. If the stretch goal is reached the game will be ported to other platforms.