Thanks very much for your kind words. I will add alternative keyboard controls at some point. I've not come across that problem before. What exactly is making popups appear for you? Is it a laptop feature of some kind?
The jump responsiveness issue is probably due to the jump happening on key-up rather than key-down, I would guess (I did have a little bit of 'bounce' on the main character which looked nice but made quick jumps a bit hit-and-miss, so I dropped that).
I like the idea of picking up abilities. Double jump and dash would work well and could be used to speed up your run. I think turn is always going to be needed to complete a room, though.
Thanks again!