examples / shmup - Start fleshing out a playable shoot-em-up using the side-scroller assets

[Gadgetoid]

"shmup" is currently very thin on the ground and only currently demos a dawn/dusk palette cycling transition that could be used between levels or during the game progres.

We discussed a procedurally-generated branching level design for this example with a minimap and have some image concepts of this somewhere.