With coloring pencils and paint used for the main effects:
The guy that plays the main part in this is director/write/producer Michel Gondry.
Would have been slightly cooler if it wasn’t in French. It still wouldn’t hold a candle to the original Taxi Driver. At only $3 to rent, or $14 to buy on Blu-ray do yourself a favor and watch it if you haven’t already.
I’m convinced that the more obscure people sometimes make something, the more attention it will get for that reason alone. “OMG he used coloring pencils and PAINT instead of cartridges and blood?! Revolutionary!”