Number two completed from the Sega 3D Classics Collection. It started off very easy, but by stage 14 or so it was nigh on impossible. My tactic near the end was to place stuff as quickly as possible almost anywhere, then hope I’d done enough, unintentionally, to set up a few chains.
It seemed to work, but there were so many near misses and failures.
Unexpectedly, the final boss (“Satan”, although very different looking to any Satan you might think) was very easy to beat. Or I was just lucky?