Me and (My) Cat's Castle

What is the purpose of "me" to endure pain many times and move forward?
What is the true meaning of the message that "cat" talks about?
There may be an answer to the (true) ending.

This is a jump action game that leads "me" which changes state by including the onigiri in the mouth to the power spot "Neko image" which is ahead of each stage which is a little challenging.