Here is the full list of all 21 PUSS! achievements.
Collect 30 heart items
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Beät 10 levèls шþŒ úàÐüäobÛèû7Ë
Beat a level witþ €\À,Ñ»ÔßGð]
Collect 30 timer items
Beat a level in a second
Do you like these glitches?
Beat an episode in 5 minutes
Get Speed and Flawless Run in every level of episode
Defeat Baphomet
Meet Ric da Fi$h
Score million points in total
Collect 30 lives
Meet the Princess
Free Icarus
Get to the boss level with no deaths
Meet Chronicorn
Meet JC
Get to the hall of seals
Beat 5 levels in a row without losing shield
Beat a level with no touching walls