This reply is very helpful! But I can't seem to find the game on Steam :O Does it have the same name there? I wonder if the developer took it down or something, because I think I found the developer's page (Cat Nigiri), but this game is not listed there.
Found it! On Steam it's called Keen: One Girl Army.
It's not listed on the developer's page, but if you make a search for "cat nigiri" it shows up.