i remember playing this game earlier when you posted it, I thought it was a cool game and it's a pretty fun game with high potential.
Some recommended fixes:
- player falling down when the game starts, you might have to set your gravity to 0 to prevent falling in a game like this
- Gate bug, even before the gate opens, players are able to just go through the gate and rescue the mouse friend. I believe your gate exists only visually.
- I would also make the game look more organized, especially the cheese, perhaps less cheese?
-speaking of cheese, since they're the collectables, they're usually not supposed to be moving
Some things I liked:
The cats
Also how touching the cats kills you, and restarts the game.
The cats movements.
Overall, I think your game has a high potential. I was intrigued with the physics so I spent a while messing with them, it was a good experience. Also very adorable game, I love cats.