Hahaha I'm glad you enjoyed it, thank you for playing!
I actually started with grab pressed, then hold, and then settled on pressed, because I often found myself grabbing the wrong things if I was holding space. I also found it a little too easy, I liked the aspect of having to time the actual press, maybe what I need to do is to increase the grab range. Its interesting to hear your opinion on it!
And I also agree on the invincibility frames being unclear, it was kind of a last-second thought to add, and I think making the alpha lower instead of 0 would be a great fix, thank you for the suggestion!