You'll be happy to know that since the version I sent to another 15 days compo, I have made some progresses : minor speed optimization on dsp1 (mario kart) and a new 8bpp rendering mode which speed up a little the emu at the cost of some palette effects unemulated.
Public version will be put on my website in few days... In the meanwhile you'll
have the another 15 days version which should be available by the end of the week!