Seconded, Ano Gaia is great, like a vertical Zynaps. That's not a perfect comparison - IMO AG feels a bit like a demo (it has no bosses) but has better designed levels and is more enjoyable to play.
(Is anyone in touch with Simon C Tillson? Could they drop me a PM if so.)
Not certain yet but I think I'll be voting Ant Attack.
General software. From trouble with the Banyan Tree to OCP Art Studio, post any general software chat here. Could include game challenges...