Blork is actually demo of unreleased shump, not PD game. It was canceled in 94. Quality is on same level as Disposible Hero and ProjectX, even if there are only three stages and last boss have no collision detection.
If I could propose more games:
ACSYS
http://hol.abime.net/4965 I'm only not sure will it require more power that cd32 have,
Agricola
Atmosfear
Diggers 2
Energy
Fatal Noise
FLOWER
The Game Machine
MR Beanbag + extra levels