Closure is shutting off two thirds of its price, going for $4.99 later today on PSN. Eyebrow Interactive's light-based puzzler is also discounted on Steam for the same price.
The Steam offer ends on November 1, while the PlayStation Blog is less clear about the PSN sale's, er, closure. The post simply says Eyebrow is "launching a special Halloween sale this week." We've reached out to the developer to shed some light.
Update: Eyebrow confirms to us the sale will last a week.