I liked the cat/dog interpretation of the theme. Like une_crepe said, it's easy to trick the ai into running in circles. Look into how the ghosts in the original Pac-Man were programmed with slightly different (but simple) behaviours to see how a few tweaks could give you a game that requires more strategy. The pixel art is also cute. Congrats on finishing your first game! Finishing something and submitting is an accomplishment you should be proud of.