I liked the game, but didn't finish it. Got my ass kicked by the second boss every time, and it sends me back to the beginning. I'd much rather just repeat the fight I just lost. Random thoughts time:
What I absolutely loved in your game where the gunshot sounds! They really sold each shot! Good!
Controls were good, responsive! What I'd like though is some time after getting hit when other hits don't register. Feels like every time I died was because I got spammed.
Like the premise about little cat with vivid imagination!
The cat and bosses looked fine, but the arenas felt empty. Some minor decoration would be nice. Then again- big arenas were cool in a game like this!
Over all- pretty good game, with minor problems.