Really nice work so far. Sure there are a few little things like the sprite colours occasionally being a bit too close to the background colours, but those a minor quibbles that can easily be sorted later. I can't say the lack of restart points hindered me though, I'm so crap at this game on every format I still haven't made it to one!
Looking forward to seeing how it progresses, nice to see the GX4000 getting some long deserved love.