wow this is way too good, probably the best submission Ive played!
the style reminds me a bit of the board game azul and getting high multipliers (x1400) was super exciting! I endet up completing my run with 2193 lux at day 12 (fire + rock combo)
I also like that you can decide to not use all of your pieces at once, my only issue was that it wasn't immediately obvious that you can only have a limited number of them, so I was wondering why I couldnt generate more... and maybe also consider adding a warning for ending the day without having used all elements