Made it to wave 11 before feeling like I was going infinite and had to call it quits :)
I really want to praise the decision to make the control for placing cows on Earth 'S'. I fumble with controls in a lot of games, especially when I'm playing dozens after a game jam, but making a core mechanic like placing cows on Earth S was extremely intuitive. It was easy to internalize it as I'm sending cows *down* to Earth, so I never had to take the seconds it normally would to remember what the control to do so was. And surprisingly, the seconds mattered during waves 5-10! There were multiple times where I was in the 10s of health down to the wire, and some clutch teleport + cow plays saved my life.
Great game, I spent a lot of time on this one!