Okay so I've solved it now. Had a run of literally only squares, including one white square and that got me here (see screenshot). I still didn't get to 48 lotusses in 13 turns so I bought five more and can finally move on.

The set-up of this level is alright, but I don't understand how anyone could solve this in just 13 moves. I watched a playthrough on YouTube and found that they had 22 moves to play with (9 years ago). That's almost double of what you have now! 13 just isn't enough. I don't get it.

Had a few god-runs, one in particular where after my first move I could play square after square. Cleared out the bottom-left fire very quickly, but then my move-counter already displayed the red 5. It's completely ridiculous!