here's a file from a while back where I tested the first level of the genesis version of radical rex. It has a few differences over the SNES version.
First two worlds. And apparently it copied over the blank frames afterwards. It stops at about 48k frames.
Made a short test of Asterix and the Great Rescue using TAStudio to make a relatively uninteresting game more interesting by swapping item slots to the music. I was bored.
First pass at level 4, I already have some ideas for improvements but that wind cycle is going to be annoying to deal with.
Stage 3 is redone, with some slight improvements. Still haven't found a way to avoid damage from that bird without causing lag.