Due to performance issues (lack of ram) they had to lower the resolution (240p instead of 480p).
Still, this game has a new soundtrack, a new level, a different gameplay mechanism and a new ship (= different difficulty level). Better gfx but in a lower resolution.
This is obvious they stumbled into many issues in the development process and couldn't backpedal. Sad ! And the fact it's a multiplatform title probably made it even more difficult to optimize it for the DC. Still looking forward to their next title though !!!
I'll use it with a "scanliner" (check "Hanzo"), it should look OK.....