I can't seem to replicate this error. Are you 100% sure you pressed M1 near the top, dragged it down while holding, and kept holding it there for the duration? Plenty of people, including all my playtesters failed to do it on the first go, no matter how I tried to explain it in game. If the issues persists then I will look into it harder. Thanks for reporting this!
It is not entirely impossible, though all colliders are placed on canvas, and I made sure canvas scales correctly on all resolutions. I tested the game on my laptop and it appeared fine, but I'll look into it. By default I made a huge safe space to grab it, and it works by detecting holding m1 button. If goo spawns then it detects it, but I am unsure why it doesn't work beyond that.