hi! so glad you enjoyed it :) yes, it is intentional that only one power-up triggers at a time, for balance reasons. i want to make a version where power-ups stack, but it would require me to re-scale and re-tune all the numbers.
a hint for strategy: you only get 2 extra moves per level, and each level multiplies the score by 11, so to be “sustainable” you either need more extra moves or a way to score more than 11x in 2-3 moves. just going 2x every move usually isn’t quite enough~
thanks for playing! if there’s enough interest, i’d love to turn this into a full game :DD