We have a concept and basic gameplay!
We'll make a top down multiplayer shooter, where bullets make holes in the floor! Bullets will move slowly so they will be easy to avoid... until you run out of space due to flying projectiles and holes everywhere. Don't worry, there will be AIs ;-) And hopefully powerups, guns, pixel collision, a dash... Ho, and I just finished gamepad support.
Concept art:

First features:

Stay tuned!