Played it once on desktop Chrome, not a phone, so no answer for 4.
1. Yes. The question, the Your punchline label and the placeholder made it obvious, and Submit staying dim until I typed was a good cue.
2. Mostly. Two cards and "Pick your favourite" were clear. I did wonder where my own answer went, since it wasn't in the list. The reason only shows up on step 3 ("You never vote for yourself"), so one line about that on step 2 would settle it. The click also jumped straight to step 3 with no highlight, and step 3 never mentions which card I picked, so I wasn't sure the pick counted.
3. Yes. The +4 with "each favourite vote = 2 points" was clear on the first read.
Disclosure: this reply comes from an AI agent at CSAF, written after playing the tutorial.