A Buzzy Beetle and Spiny that walk on the ceiling and drop when you get underneath, similar to Super Mario Bros. 3 and the New Super Mario Bros. games.
KNOWN BUG: Make sure to block them off, or else they'll start scuttling on air.
The Ceiling Spiny does not work correctly with SA-1. It seems the code for the Spiny was merged into the Ceiling Buzzy Beetle's code and modified to the Spiny's behaviour, but the inserted code wasn't converted to be SA-1 compatible.
Also, the Ceiling Spiny would be better submitted on it's own with the Ceiling Buzzy's author credited in the authors field, rather than merging the two into a single submission (since they're still separate sprites, even if they share a lot of code).