Title music included, gameplay begins at 5:00. It would had been possible to destroy some of the creatures faster, but I was waiting for them to attack first. There's a gfx bug in the highscore screen.
From Wikipedia:
The Rubicon (Latin: Rubicō, Italian: Rubicone) is a shallow river in northeastern Italy, about 80 kilometres long, running from the Apennine Mountains to the Adriatic Sea through the southern Emilia-Romagna region, between the towns of Rimini and Cesena. Learn about Rubicon