Now that Penguin Adventure is done, we have decided to take the last month of the year to port Gradius for the ColecoVision Super Game Module. That way we could concentrate on the two arcade ports next year.
The SGM version of Gradius is based on the MSX version, which is quite good. However the SGM version will receive a complete makeover to make it look more like the arcade original. So for example, check the screenshots to see a before/after comparison of stage 2.
About 50% of the code has been ported, and the visual makeover will start after we get the game fully ported and running.
More info as development progress....