So I thought about getting this one. It seems to be the same devs as for OSAWARI ISLAND (Superhippo). The sprites also look similar. There's a trailer on youtube (which I can't post because this forum doesn't allow links) and some other short clips that show a bit of the sprites.

But that's all the info I can find. Did anybody try it already and tell me a bit about the gameplay? I guess as it is a full-price game there is no energy regeneration and you can play as long as you want? Can you unlock the Nymphs as you play or do you need to rely on RNG? How about the story?