We've been hard at work on Whisker Squadron for months, and just uploaded a new beta/demo. This beta is a much more complete demonstration of the type of game we're aiming for: a procedurally-generated mission that takes you across a galaxy map, with randomized upgrades, "events", several worlds to fight through, and space-themed transition worlds.
We also added procedurally-generated boss fights, and mini-bosses.
For everyone not in the beta - keep an eye on this space this week ;)