Spike II: The Great Emu War
From the Catalog page:
He is back.
The emus are at the gates of CatTown. The cat army is overwhelmed by the number of feathered soldiers, the felines will soon become... an endangered species.
General Mittens has no other choice: he must call the legendary Spike to the rescue.
Equipped with your minigun, try to survive the horde of emus who will do their best to catch you. As General Mittens used to say: "You are our last hope, Spike!"
Goloso Games - Code/Art
Philip Aldous - Music
Daniele Giardini - Key Art
The game also features a physical edition which can be obtained from the developers website.