I'm dallas from yt. Late reply, but yep, killed all three. They were kinda hard (except for the first one), but once I understood what I had to do, not so much. It is a really nice game I have to say.
And yo, how did u made the player knockback when he gets hit? I asked at the discord and ppl told me to use "bounce", but even though I am at version 3.0 this bounce doesn't show to me