Pretty good, but there are some small things that I would fix:
- Use tilemap for the levels, because the square sprites are not perfectly aligned
- Set Player's Rigidbody detection mode to "Continuous", because it can get throught walls
- There is a lot of unnecessary text...
- Boxes are soooo buggy...
- When the cat is climbing and reaches the top of a wall, it glitches
- When the cat stops climbing and falls on a box, the sprite does not change
- The rat bite is also a bit buggy...
I hope you fix all that stuff ;)