I like the artwork! And the simple idea of cat and mouse is always an interesting one to work with.  I was a bit confused about the goal at first... was this described somewhere and I missed it? The G&W series moved a bit toward two-player games later in its history, and I think there's alot of fun to be had in a simple handheld for two players to play on the bus, while waiting at school, etc. Great job for your first time attempting a G&W game!

I'm looking forward to playing! How to start the game in the browser?