Finished it. It REALLY helps to just take a break once it starts getting boring. I came in and just wiped the last 7 levels without any effort after said break.
On one of the levels I managed to get the cat to eat almost every piece of sushi in one go. It took like 2 hours for him to finally work his way into a box...
This game made no sense, the concept is rather unoriginal and the puzzles are pretty linear and obvious. For a 'puzzle' game i sure didn't need to turn my brain on much.
If it had a clearer/actual story it would at least be more satisfying to finish.