Here is the full list of all 31 I wanna be The Cat achievements.
Die 100 times
Die 666 times
Die 999 times
Gain 100 coins
Gain 777 coins
Gain 9000 coins
Use 5 objects
Use 42 objects
Use 200 objects
Finish a race
Win a race
Complete a warp level
Complete World 1
Complete World 2
Complete World 3
Complete World 4
Win your first fight
Beat all the enemies
Complete medium mode
Complete hard mode
Complete impossible mode
Win the game on hard losing less than 9 lives
Full upgrades
Win the game on impossible without buying any object
Win the game on impossible with no perks on
Win the game on medium without dying
Win the game on medium under 13 minutes
Win the game on hard taking no more than 3 hits
Complete the magic tower
Complete the magic tower without getting hit
Get max attack power in the magic tower