I'd say the game's difficulty leans a bit on the easy side, but that's fine :) What I've gathered from other similar games is that resource prices go up as the game progresses, to keep you challenged. After a while, the souls are maxed out and no amount of spending really makes a dent. But that can't realistically be tuned in 48 hours ;)
The art is cute, i really like the little meowing sounds!
I had fun, well done for your submission!