more progress: Got some slight colour splits in to make it look better, made the explosion into a 64 pixel wide hardware sprite as it was slowing things down and got the lamps collideable and got the snake in and animated. Fixed loads of bugs too.
Still plenty of things to do, next step is to get some sfx going. Gonna have 4-channel music, sfx only or 3-channel music with sfx. Took a while to do 3-channel versions of the tunes earlier in the year.
Got to do it this year, don't want to have to change the text from "21 years in the making" to "22"!