As I said in a previous post, in these days me and my colleague at Noctua were working in the SpeccyJam 2014. The goal of the jam/competition is to make a game with the same look and feel of an original ZX Spectrum game. This introduces a lot of interesting limitations. First, it constrains our resolution to  256 × 192 (that is, however, a really big improvement respect to the LowRezJam :D), second it forces us to use only 15 colors. But most important of all, the non-strict limitation, is to simulate the color clash effect of the original Spectrum on modern engines. This was the most hard constraint that forced us to explore 2D shaders and a lot of simulated low-level algorithms on top of a modern engine like Unity 3D.