Hi!

Object collecting is always fun, here is some things to consider:

• Adding some context to it, why I'm collecting cats?
• Big lag spikes, i don't have a super computer but feels unreasonable that some parts of the map makes stutter the game. (maybe it's my browser or something)
• It's not really a game design problem, but the player character looks like it's violently poops when moving xd i mean its really funny, maybe implement as a feature? (like make then game intentionally weird as possible? ) 

Thanks for the game and keep up the good work!

• Overall: Great start to a simple idea~
• Fun: It was fun to explore the world, I think the small things like flowers don't need colliers.
• Visuals (Graphics): Nice start to the pixel art. Full screen would help a lot.  The lighting sprites should be a bit more smoothed out alpha gradient.  Also, I thought the cat trail was blood at first hehe.  Maybe light grey/brown would be a better color
• User Interface: Good start.  Hard to read because I couldn't do full screen
• Audio: Nice simple sounds.  Might be cool if each box had a different meow~~

Nice work and keep it up! Please check out my game when you have time :D