Love the addition of the perks and new cards I saw so far btw (e.g. 'love' and '+1 every time you use it')! I think it was also a wise decision to make the 3 bombs more expensive.
It became much harder at the start though, I might have to find a new balance there, but I have the feeling you run out of energy too soon and it's a bit too much based on luck whether you make it. However, I just played it a few times now, so maybe I'm too early with my feedback. As soon as you have a perk it becomes more manageable.
Did you remove the 'refill energy' card btw or is it just more rare now?